Degreasing cleaners tend to leave residues that can prevent adhesion but you can get rid of them by thoroughly rinsing the chair for several minutes. Let the furniture dry. How To Paint Cast Aluminum Patio Furniture Ehow Cast Aluminum Patio Furniture Aluminum Patio Furniture Painted Outdoor Furniture If your cast-aluminum patio furniture has become weathered with time and use you can redo it with the right materials and technique. How to restore cast aluminum patio furniture . Allow the furniture to dry in the sun for one to two hours. Clean the dirt from your aluminum furniture using mild soap water and a sponge. Rub the surface with automotive rubbing or polishing compound to abrade away oxidation. Spray the cleaner onto your item and rub it. Allow the cast aluminum chair to dry under the sun for two hours. First of all remove all the cushions from the furniture then set the furniture on the clean and flat surface. To restore the shine of the furniture you can s...