If your getting the wheels powdercoated I would let them deal with stripping them or ask who they recommend locally - they will probably have a company they use when they do have to strip stuff.
As for the studs - I found on my fake split rims that they would just unscrew. Your best bet is to unscrew them all, get the wheel powder coated, replace any studs they are screwed and then just screw them back in - job done