I went to my powder coater on Thursday. I am having my chrome 20x8 20x10 combo powder coated and he quoted me 500 for him to blast off the chrome and powder them. He also told me he could clean the hell out of them and just powder over the chrome for 400 but that doesn't sound like the right way to do it:dunno:
The chrome doesn't need to be totally removed. The amount of pressure and agressive grit of the media that would need to be used to physically blast away chrome would 99% likely screw up the wheel underneath.
Chrome is a perfectly good base to use for powder as long as its in good shape and is prepped correctly. What we do is clean well,then media blast at a low pressure and non aggressive grit. This completely removes all the shine and slickness of the chrome, and the powder adheres to it at this point just as well as it would to blasted aluminum or steel.
We blast and coat over chrome every day here, never an issue once.