I had just dry wall up in the garage, and on the ceiling the tape was letting loose, and some of it was beginning to get a slight bow to it. The man put on what looks like popcorn texture. Will this work in a unheated garage?

My husband and I just spent a whole day applying a coat of Valspar eggshell white paint to our brand new home, only to find out that our large walls (floor to cathedral ceiling) look awful. Despite our best efforts, the roller marks show when the walls are viewed on