I bought the black scoops, and made sure the surface was clean, tried spraying with Elect. Blue, and 5 seconds after spraying the black thin coating bubbled up and started just flaking off under the blue causing a mess. If you have some other specific instruct on how to paint, would love to hear, but the prepainted black should have been like a nice prime coat....didn't happen.
2009 335i Jet Black LCI
BMS DCI, COBB, AA FMIC, BLACK AG310's Staggered, Black Kidney, Chrome Delete Vinyl Wrap, Reflector delete, M3 Rear Spoiler, MTech H8 AE's, GP Thunder Fogs.