get a grinder for gringing..a sander for sanding or buffing. That being said..get a 4 1/2 grinder. I have used one in work for over 13 years...Craftsman. I also have a sander/polisher that I put 8" 50 grit discs on and also buff with it. but that is a different animal. You want the 4 1/2 for grinding welds and such.
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Pete's Ponies
Mustang RUSToration & Performance
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