I use 3M rubbing combound.I've used perfect-it,the new extra cut cerioum (sp)oxide stuff and I found a quart of super duty that works well.I have my Blast @ 1000 A with a very light coat of rubbing compound so you can just see the sanding lines and a twisted fury @1000 A and as high of a gloss finish I could get with the compound.I'm very satisfied with the results and a little goes a long way.
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The harder I try the harder they fall