[dagobert]

I know plating won't stick to chrome, not sure about powdercoating but here's how to get rid of the chrome layer. You could try soaking the parts in a solution of 2 parts distilled water and 1 part muratic acid (see pool cleaner soultions at the local WalMart or hardware chain store) for a few minutes, until the blueish haze stops coming off the parts (that's the chrome seperating). Remember, the silver color underneath is Nickel, NOT chrome, and that can stay. All you need is to get the blueish haze off the part. That's the chrome itself. Then rinse the part WELL in clean water with a little baking soda added to neutralize the acid, then rinse again in pure distilled water. Then prep as normally required for powdercoating, and that should eliminate the chrome.