I am having very similar problems with the Alclad Chrome. I use the Tamiya gloss black for the base backing primer. But when I paint the chrome, I either get it to heavy, and it comes out silver, or I think I have a good coat on it, because it comes out wit a mirror shine, but as it dries, it gets black splotchy spots in it, like it's not on heavy enough. What's the secret to getting this stuff right?