A Simple Guide On How To Paint Over Polyurethane Without Sanding

How to paint over polyurethane without sanding?” certainly is the question that anyone who  dislikes  sanding in DIY projects has in mind.

Sanding might be extremely important to the painting process since it helps avoid the surface scratching and peeling off after the project is completed. However, there is nothing more boring than spending several hours on sanding.

Do not worry because now we have had a solution for you. Let’s dive right in! 

What Is Polyurethane?

Polyurethane, or PU for short, is a polymer that has many applications in life. 

It has two main forms of existence: hard and foam. Polyurethane that existed in hard structures works wonders in polishing and protecting wooden furniture. For the latter form, it is common to make foam mattresses in seats (such as car seats). 

In addition, the application of PU foam is also used to protect and transport fragile equipment and tools.

How To Paint Over Polyurethane Without Sanding?

As you know, sanding away varnish or sealer is crucial before painting any furniture so that the new paint adheres properly. However, coming to this article, you can completely skip it if you do not want to waste time on sanding. Let’s follow below to figure out the way.

In reality, there are a few ways to do this, but we recommend using an oil-based primer to prepare your varnished wood for a better adhesion surface. You can choose an white oil-based primer for the best coverage or oil as liquid sander deglosser.

Step 1

First, wipe the surface out with a clean piece of cloth. This step will help eliminate the dirt, varnished wood or sealer sticking to the surface of the wood and create a base layer for efficient overpainting.

Step 2

Next, dip your brush or roller into the primer, then apply a thin layer of base-oil primer directly to the surface. 

If you use oil as a deglosser, make sure that you also have latex paint to create a mixture similar to the primer mentioned above. Mix them by stirring well to a mixture as you expected. 

Take note of the instructions of the manufacturer to ensure the quality you get. Now, let your furniture dry completely before going to the next step.

When working with dark woods or polyurethane, you should apply the second coating after the first layer is dry to get a better effect.

how to paint over polyurethane without sanding

Step 3 

Finally, paint over polyurethane on the surface, apply another one or two layers. Afterward, you need to wait from 30 minutes to one hour for it to dry completely.  However, we suggest you let it set overnight to get the best results.

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Overall, if you find sanding tedious, then applying this guide on how to paint over polyurethane without sanding is a wonderful solution for your project. 

That being said, sanding will always be the step you should not ignore to get the best painting over polyurethane. 

Reference source: How to paint over stained / varnish wood without sanding


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