The strongest wheel cleaner out there would be CG grimp reaper. But with what you are talking about with how it is baked on... You need to buff it out. I know from experence. I used the 3M stuff and I was happy with the results. But I would follow with some sort of wheel wax. Or if you want to give crazy protection use CG jetseal and follow with a nice protective wax..
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2006 E90 SG-Dinan Ram Air Intake-Dinan Throttle Body-Dinan Exhaust-19' Hyperblack CSL's-15/5 tint-Matte Black Grills-M3 Spoiler Lip-Amber Delete-Smoke Side Signals
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