Flat, Semigloss or Gloss. The garage isn't the place for a flat finish. Flat paint is easy to scuff, and scuff marks are difficult to wash out of a flat finish. Moreover, garage interiors tend to be moldy, and washing mold from a flat finish can cause permanent discoloration.
I wanted advice on what kind of paint to use on the walls of an unheated garage? Exterior? I know that flat paint will supposedly hide more .