I have 2 sets of the ARE magnesiums, and I also would like to know the preferred means to clean them and prep for painting; magnesium wheels need to be painted in order to seal them from air leakage, and also to protect against rapid oxidation (which you are seeing on yours). Anyone with suggestions for how to clear the wheels, and any suggestions for prepping for primer and paint, I know I'd love to get the suggestions, and I'm sure that 70L34 would as well.
'70L34: What are your plans for the ones you have, given they are 5 on 5" lug pattern?