Hi, have you tried any of the Humbrol range of enamels? They have silver, copper, gold, green mist, sunset red, baltic blue, gun metal, brass, bronze, aluminium, chrome silver, metallic black and moonlight blue in their metallic range as well as aluminium, polished aluminium, polished steel and gunmetal in the metalcote range with the gunmetal one being able to be buffed from its flat appearence to a shiny coat. I have had my tinlets for longer than I can remember with them all still being very fluid when used occasionally. Cheers Jim