Not many materials like to stick to a glossy surface. So today, when I had to skim-float a wall to smooth it, in order to help the joint compound adhere to the existing paint, I first wiped the wall down with Liquid Sandpaper – a chemical formulated to knock off the gloss and prepare the surface to accept the coating you are wanting to apply on top of it.
Tags: gloss, joint compound, liquid sandpaper, skim float
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