When I promised to paint flowers on Lillie's cane, I didn't know it was an aluminum cane. That stymied me for about two months, but then I just went ahead and did it. I scratched up the aluminum surface with steel wool, sprayed on black Krylon, painted flowers (acrylic paint mixed with a little gesso to make it more opaque) and sprayed on a couple coats of clear Krylon. I know the paint will scratch off. Perhaps I'll check into automotive paint next time. Suggestions welcome!