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My E90 Alpine white was swirled and deeply scratched, I guess from years of auto car washes.
After trying different methods, the best results were returned with:
DA Polishing machine
Pass=How many time I went over the area
1st step - 2 passes
Blue Wool Rupes PAD
Blue Rupes Coarse Compound
2nd step - 3 to 4 passes
Green Rupes Foam Pad
Virtus 487 UHD Extreme Polish (Apparently it cuts, and after a 2nd pass it polishes)
3rd step - 2 Passes
Yellow Rupes Foam Pad
Yellow Rupes Fine Compund
A lot of bigger scratches are still visible only in the sun, but the only way to dig them out was to wet sand which I did not want to do due to risk(first time doing it, and time consuming). I did a test spot>Wetsand 3000>Wetsand 6000>Blue Coarse and Blue Wool>Yellow Foam Pad and Yellow Fine compund>And it turned out like glass without any scratches, but the 3 stage killed me enough to not even think of wetsanding haha.
I tip my hat off to detailing guys, polishing is extremly physical.
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