I repainted some alloy wheels several years ago. I used Dupli-Color silver wheel coating and they looked great. I don't usually use a clear coat but the directions advised using it for extra durability so I figured why not? They looked terrific. I never mounted them on a car and stored them in my shed for a couple of years. When I took them out I couldn't believe my eyes that the clear coat had yellowed badly. I know it was the clear coat because when I sanded them the silver underneath was fine. I am repainting them again with the silver and I am afraid to use the clear. Do you think it was the clear paint or the storage that did this?