I've been using P21S for a long time until I discovered the Meguiar G14324 last year. That's 1/4 the price of the P21S. Some of my cars have custom rims. I've always been careful about what to use on these bikes. Because if you make a wrong choice, it can damage the surface and there is no turning back! This Meguiar is basically built the same as the P21S. This formula hasn't harmed any of my HRE and Advan forged wheels. All OEM factory bikes are good too. It needs to be lightly brushed like the P21S. The P21S has a stronger bite than this Meguiar. I use about 3 washes (12 wheels) per 24 ounce bottle. I usually buy 2 or 3 bottles at a time.
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