Im looking for an alternative to P21s to use on cheaper wheels. I DO NOT want anything acidic, extremely alkaline, must be safe on all wheels and tires, and it should be relatively cheap. However, I would like it to be slightly stronger then P21s. Heres a list Ive come up with so far.
BlackFire Gel Wheel & Tire Cleaner- water based, pH of 7.5 $44.95/ gallon
Menzerna Gel 7.5 Tire & Wheel Cleaner- pH of 7.5 $24.95/ gallon (maybe the same thing as BlackFire?)
303 Aerospace Cleaner- pH of 9.5 can be used anywhere from full strength to 50:1! $39.95/ gallon
1z Wheel Cleaner 'Felgen Reiniger'- dont have any info on it