
Prep is key to any polishing. Sanding is the *THE* most critical part of the process. Most of the stuff I do gets wet sanded up to 400 and I absolutely make sure at this step I get *ALL* the fine scratches out. A 1500w Halogen lamp or the sun will show me clearly if I got 'em all out.
One it's sanded properly, I start in with the compounds. Cleaning THOROUGHLY between steps and keeping your other wheels covered up is very important too. You don't want to cross contaminate your wheels with leftover compound from your previous step, and you don't want all that black **** that's flying around setling on your other wheels. You're inviting scratches if you do.
Dunno if this will help you, but I've recently changed my procedure and don't use the black/sisal combo anymore. Once I'm satisfied with the sanding, I use a tight spiral wheel and tripoli for the initial polish. I then follow up with a spiral sewn wheel and green compound, then a loose cotton, or flannel wheel with the white. I'm having excellent results with this process with virtually no scratching.
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