How To Paint Plastic Chairs - Step 2.5 (Just a quick video on how to wet sand the surface. That&#x27;s a 1,000 grit sandpaper by 3M. You can see here how you should apply the first coat of paint. The color that I chose in this chairs is Nutmeg. I applied 2 coats, but you can apply as much as three coats if you want. The most important thing here is to wet sand the surface until is completely soft)