Pour chemical paint stripper recommended for use on aluminum onto a rag. Use the rag to spread the stripper onto the surface of the metal. Allow the stripper to sit for about 10 minutes, and then wipe away the paint. Rinse the aluminum with water and dry with a towel.
Spray the aluminum with oven cleaner. Allow the cleaner to sit for about 10 minutes. Put on rubber gloves. Rub the cleaner into the metal with steel wool. Rinse the metal with clean water and dry with a towel.
Rub some rough-grit polishing compound onto a buffing cloth. Attach the cloth to a polishing wheel. Polish the surface of the metal for about 30 seconds per section. Rinse the metal with water and dry with a towel.
Repaint the surface of the metal using spray paint or other paint designed for use on aluminum.