I have a Audi A3 with the factory wheels. I want to paint them black. I bought brake caliper paint and I am confident the paint itself will be great. I want to ask that…… does anyone out there know if these wheels have a clear coat on them, and if so, would I need to strip/sand the wheels before I painted them. I just worry about the paint adhering to the wheels. I’m having aluminium rims if u too...having this one and know something about this plz help me out..