Best way to use Gardz(vinyl wallpaper glue left on RAW drywall)!!
I have removed the vinyl wallpaper in my bathroom. It was put on raw drywall and feel rough to the touch. Some areas look a little rougher, but it is hard to tell as it is gray. After a lot of research, I am thinking I need to use the Gardz surface sealer. My question is do I need to try to sand first, the apply the Gardz? Apply it first then see if it needs sanding? What do you apply it with? Help please!!!!