Because metal is a hard, nonporous surface, paint does not adhere to it very well. This quality makes it much easier to remove old unwanted paint. Unlike wood, which is relatively soft and porous, metal can endure much more stress from abrasion techniques used to strip away paint. However, before you attempt to strip paint from metal, you need to know the proper way to soften the old paint by using chemical stripping agents.
Apply the paint stripper to the metal using a 3- to 4-inch oil-based paintbrush.
Allow the paint stripper to sit for 10 minutes.
Scrape away the paint using a metal putty knife.
Scrape away any remaining paint using a wire brush.
Apply mineral spirits to any remaining stubborn bits of paint.
Sand the remaining bits of paint away using 80-grit sandpaper.