I'm trying to figure out a way to seal Testors Crome paint from the spray can, as well as silvers, and other metalic finishes with out dulling out the finish. For example: I have 1/144th b-29 that I painted the control Surfaces silver. I used testors gloss sealer from the spray can again to seal. It went from being silver to a dark gray metalic finish. Any suggestions? I'm concerned because the crome rubs off on the fingers if you touch it. thanks.