Latex is a favorite choice of paint with professionals and DIYers thanks to its flexibility and versatility. It’s the one paint you can use to remodel door frames and old cabinets, as it helps create a smooth, beautiful finish.
In case you’re wondering, yes, it’s possible to sand latex. It’s even better to sand latex between coats because it helps eliminate messy paint bumps and scabs.
Moreover, the waiting time between coats and the sanding techniques you employ in your project significantly determine its overall outcome.
In today’s post, we will cover the topic of sanding latex paint, how to sand latex paint, and the best sanders to use. Let’s get started.
Can You Sand Latex Paint?
Yes, it’s very much possible to sand latex. It’s even recommended that you sand between each coat of paint to ensure glossy smooth results. Sanding latex, especially fresh latex paint, requires flexible sandpaper (fine to medium grit) of 120-150. Add light touches and a wet rag for wiping, and you’ll have the best possible outcome.
Can You Wet Sand Latex Paint?
Yes, you can wet sand latex paint, and it’s easier than you might think. Since latex helps protect your surface from potential damage, it’s best to wet sand with a soft bristle brush or fine-grit sandpaper to clean paint impurities more effectively.
Furthermore, wet sanding involves using water as a lubricant, so it’s ideal for finishing the last top coat. Wet sanding latex is best done by hand, with 180-220 grit sandpaper being the ideal option for removing brush marks.
Use a more abrasive sandpaper of about 1200 grit to ensure a smooth finish.
How Long to Wait to Sand Latex Paint?
The time you should wait before you can sand latex paint after spray painting depends on how long the paint takes to dry. So it’s largely dependent on the paint brand you used. The faster it dries, the better.
Other factors like temperature, humidity levels, sheen, and pigments influence the paint drying time. You can paint, sand, and wrap up your project using the right products, employ the best techniques, and work under favorable conditions.
However, it’s best to comply with the specifications from the manufacturer, so ensure you read the instructions on the product label.
Fortunately, most latex paint options like Rust-Oleum dries completely within four hours, although other brands might take longer.
It’s best to let your paint dry completely before adding another coat or sanding; otherwise, you might damage your work and sand it off entirely.
Also, try to paint latex within the ideal temperature range of 70-80 degrees Fahrenheit, which will speed up drying. You can even get creative and run a dehumidifier, fan, or air conditioner to hasten things up.
Why Sand Latex Paint?
There are a few reasons why you should consider sanding latex paint. For example, when the existing paint is old and peeling, sanding and scrapping it off ensures you remove the old ugly paint in readiness for a fresh new coat.
Similarly, sanding a surface previously painted with latex paint allows you to eliminate imperfections or pimples which may be unsightly so you can recoat it with a new coat.
Sanding also helps create a rough surface where too much gloss or high gloss coating is used.
Since paint will not adhere properly on the glossy surface, sanding helps roughen it up, ensuring that the next layer of paint or primer will bite deep into the old coat.
How to Sand Latex Paint?
When working with paint, the general rule of thumb is to ensure your surface is clear of pollutants that may affect the project outcome.
Repairing and cleaning the surface is a no-brainer, yet some overlook this crucial step. While time-consuming, you’ll be happier with the results than if you skipped surface cleaning and preparation.
Below is a step-by-step procedure on how to sand latex paint smooth and effectively. Let’s start with the requirements for sanding latex:
What You’ll Need
For this step, the tools and materials depend on what you’re working on and your objectives. For example, we recommend orbital sanders to remove excess surface gloss, especially varnish and compound clear coats.
But if you wish to strip off the primer finish, use a fitted sheet sander. An oscillating sander is another excellent choice for detailed latex sanding or working on complicated surface corners.
As long as the sandpaper grit is of the right grade, it will do a fine job. Below is a list of other tools and items you’ll need.
- Dry cloth for removing dust.
- Shop-vac to suck up debris.
- Safety goggles.
- A filter mask.
- Steel scrubbing brush.
- Plastic sheeting.
- Warm water.
With everything in place, let’s go over the procedure.
Step 1: Cover the Work Surface
Paint spills are inevitable, so you want to protect the work surface by spreading a large cloth or plastic sheet on the floor. On top of that, spread a large canvas drape cloth to contain paint overspray and create a non-slip surface.
Step 2: Clean the Surface
Mix TSP and warm water into a container for a mild cleaning solution. Then, dip and wipe the substrate using a cloth to remove all the dust and grime.
After thorough cleaning, rinse with clean, warm water and leave to dry. Once the smooth surface dries, examine it for nicks and scratches, then use a putty knife and fuller to fix them.
Step 3: Sand the Flat Surface Areas
To sand out the flat surface areas, an orbital sander or 180-grit sandpaper would be perfect for smoothening the surface.
Your goal for this step is to smoothen out the rough patches and surface bumps, not strip off the top coating on the substrate.
Smoothening and creating light surface scratches essentially help improve paint adhesion.
Step 4: Remove the Sanding Dust
This is where a brush-outfitted shop vacuum comes in. Go for those having a filter and a bag to suck in the dust and make your work easier.
For this step, avoid using a blower as much as possible, as it will increase airborne dust while redistributing debris all over the surface. With that done, grab a damp cloth and wipe away the dust residues.
Step 5: Priming
It’s time to apply a primer on your cleaned substrate. After the first coat, leave it to dry. Add the subsequent coats as necessary once you notice that it creates a transparent, chalky look and feel.
Step 6: Sand the Primer
After the primer has cured, use a fine 220-grit sandpaper to sand it out. Ensure you employ light touches that will not gouge or cut out the primer off the surface. Once again, wipe the surface with a damp rag or a tack cloth.
Step 7: Spray Paint the Surface
It’s time to spray paint the surface with latex paint. Depending on your needs and preferences, use an aerosol spray can fitted with a handle or a spray gun. You can even use an airless sprayer. Follow all the pro rules for spray painting latex paint.
Step 8: Sand the First Coat
Wait for the time specified on the paint can until it dries, then sand the first coat with 220-grit sandpaper or orbital sander. Sanding at this stage, especially with minimal pressure, helps eliminate bumps and other surface inconsistencies.
Step 9: Apply a Second Paint Coat
Again, let the paint dry for the time specified on the label, then apply the second layer. Once that’s achieved, let it dry, then proceed with sanding. Rinse and repeat these steps until you finish the number of paint coats you intended to apply and sand.
Sanding Different Latex Paints
If you’re looking for ways to sand different types of latex, below are some examples worth checking out.
How to Sand Fresh Latex Paint
For freshly painted latex, use sandpaper grit of 120-150 to sand out the imperfections. These sandpaper grit options are ideal for non-sealed latex paint, which typically hardens after 30 days.
Avoid higher grits as they can cause the fresh paint to develop scratches. When sanding, use a gentle touch to avoid sanding off the paint. Next, use a moist cloth to wipe the dust generated by sanding.
Sanding Old Latex Paint
When it comes to sanding old latex paint, first scrub the loose paint off the surface using a wire brush or paint scraper. You can even use a grinder to eliminate all the rough patches.
Next, use fine-grit sandpaper to wet sand the old latex paint. You can even use an oscillating sanding tool to shape the uneven corners.
Once the old peeling paint is gone, use a shop vac to vacuum the paint particles off the surface. From there, you can prime and repaint your sanded surface as desired.
Sanding Uncured Latex Paint
Sanding cured latex paint is a no-brainer. However, for uncured latex paint, start with a handheld orbital sander, then transition to 180-220 fine grit sandpaper and expertly sand it down.
Remove all the residues from the surface before applying the next coat of paint. A soft-bristle dusting brush works best in this step.
Remember that sanding uncured latex paint helps to make it even and level so the next paint can adhere better. You’re not looking to wipe the paint off completely.
How Long For Latex Paint To Dry Before Sanding
Drying time depends on the paint quality and brand. However, you should give your paint 12-32 hours to dry before you can sand it.
Although latex is a water-based paint, and premium brands like Rust-Oleum are known to dry faster, it’s best to observe this standard waiting time, even for latex.
Alternatively, allow your paint to sit overnight, then sand in the morning. Furthermore, use only the right sandpaper, especially those with fine to medium grits.
Avoid coarse sanding options as they may create scratches on the surface. Instead, stick with 120-220 grits and always remove dust particles before reapplying a new coat.
Should You Sand Between Coats of Latex Paint?
Yes. Sanding between coats of latex helps create a smooth glossy outcome, removing surface imperfections and flaws.
While this is not a mandatory requirement, especially with the first two coats of paint, it enables you to achieve professional finishes, so ensure you don’t skip it.
Furthermore, you can finish your paint job within a day if you follow the right techniques for painting, sanding, and recoating your surface.
Best sander for latex paint
When working with latex paint, choosing the best sander is equivalent to achieving optimal results.
There are different sanders for various sanding situations, and knowing which one to use for each step or project is crucial.
For example, if you want to remove excess gloss coating on a substrate, use a random orbital sander, especially those fitted with coarse-grit paper.
Similarly, a sheet-finishing sander with inbuilt mesh sheets works great at sanding smooth surfaces and removing patches of dried paint.
But a close-quarter electric grinder is most suitable if you want something for construction or heavy-duty commercial sanding.
Sanding can be done manually or with premium tools. If you prefer to use an orbital sander and forego hand sand latex paint, below are a few best examples to check out:
1. The Bosch 1250DEVS Orbital Sander
The Bosch 1250DEVS Orbital Sander tops our list because of its efficiency, robustness, durability, and ability to take on any surface bump and inconsistencies.
It features comfortable grips and an excellent turbo mode that can handle roughness. As a random orbital sander, the Bosch ensures high-quality, scratch-free results.
It has a big sanding pad measuring up to six inches and will serve you more than a lifetime.
2. Makita 9903 Belt Sander
Next on our list is the 9903 Makita Belt sander, a beautifully designed sander capable of handling any paint removal project.
Featuring a 3″ by 21″ belt, this machine can run at 1,440 Feet Per Minute, clearing anything on its way, and its dust extraction capabilities are just as impressive.
The Makita 9903 is the ultimate machine for professional sanding performance.
Pro Tips for Sanding Latex Paint
Whether you’re a seasoned painter or an upcoming DIYer, you want the best possible results for each project you undertake. Therefore, a few tips for sanding latex paint might come in handy. Let’s take a look at some of them.
Work within the right temperature ranges: 60° to 80° F is the standard temperature for latex paint, so always ensure you work within these conditions for faster drying.
Ventilate your workspace: As the paint dries, you can reduce the waiting time by providing natural ventilation, especially if spray painting indoors. Keep the doors and windows open and ensure the fan stays on throughout.
Protect your health: Paint fumes and sanding dust are an unhealthy combination. You don’t want to be distracted by the harmful latex paint fumes and debris when painting and sanding latex paint, so wear a filter mask and eye goggles to maintain a safer working experience.
Always remove the dust before recoating: Dust generated by sanding will accumulate on the surface. You want to thoroughly wipe them away before adding the next coat of latex paint, as doing so will prevent uneven texture and other impurities on your finish.
FAQS: Can You Sand Latex Paint?
Can you sand latex paint to remove brush marks?
Yes. Use 120 or 150-grit sandpaper to ensure your project results in a beautiful piece of art. Always use the right sandpaper type for each medium you intend to sand. For example, coarse or high-grit sandpaper will be more efficient when removing excess gloss coating.
What grit sandpaper between coats of latex paint?
The best sandpaper for sanding between coats is those within the 180-220 grit range. Finer grits within this range are even more suitable for sanding interior walls. However, to polish the surface, use higher grit sandpaper of 240 and above. After each sanding session, always wipe the residues accumulated thoroughly so they don’t interfere with the next coat of paint.
Can you sand down the paint to make it smooth?
You’re more likely to achieve an even smoother finish if you sand the final coat of paint. Sanding the first coat helps eliminate bumps and other inconsistencies, while lightly sanding down the final coat helps create an even, smooth finish. Use the correct sandpaper, then wipe the residues with a moist rag or shop vacuum.
Why Is My Latex Paint Still Tacky?
Your latex paint hasn’t dried thoroughly hence the sticky and tacky feeling when you touch it. The primary reason could be excess humidity or unfavorable weather. The weather should be warm and windy, not too hot or cold. Also, check the paint thickness. A thin coat tends to dry faster, while your paint will struggle to dry if the layers are too thick.
Why Does Latex Paint Take So Long To Dry?
Excess moisture could be the primary catalyst. The more moisture there is in the air, the harder it is for the water in latex paint to evaporate. Consequently, the paint stays wet for longer than necessary. You can fix this issue by turning on the fan and running a dehumidifier.
Summary: Can I Sand Latex Paint?
If your latex-painted surface is rough or the finishes aren’t as smooth and even, you can sand it with grit-based sandpaper and then apply subsequent coats of paint.
The ideal sandpaper for sanding fresh paint should be 120 to 150 grit, and for paint that’s already cured, 180-220 grit would do.
On the other hand, if you want to remove too many layers of compound or varnish on a latex-coated surface, you should work with coarse grit sandpaper or a scrubbing brush that won’t strip the paint off.
Hand sanding latex is preferable as it reduces the heat accumulated, resulting in finer finishes. So while you can sand latex, other alternative techniques exist for removing surface paint coating.
A good example is using cleaning agents that help remove gloss finishes without affecting existing paint.