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Wet or dry sandpaper to Polish my motorcycle frame?2002
Q. I was wondering when I'm polishing my frame do you have to use water or can you just do it dry or what is better? Is there anything else you have to use when sanding like some kind of compound? And can I use an air tool to do this too and what kind of tool will help me out doing this?
Thanks for helping me out,Bob Komraus
- Euclid, Ohio
August 9, 2008
A. Hi, Bob. Sorry to be tedious with a semantics issue, but it will explain why you are hearing what sounds like contradictory information. When metal finishers speak of "polishing", they probably mean the intermediate step between grinding and buffing. But you probably are not interested in stopping at a rough polish stage . . . you are probably looking for a fully shiny "buffed" finish.
So if someone says they "polish" with sandpaper or scotchbrite, they mean they rough polish; you can't get to a shiny buffed finish with sandpaper whether wet or dry. For that you need soft cotton or flannel buffing pads mounted on an air tool, and a lot of work, probably with progressively finer buffing compounds -- these compounds are "waxy" in texture.
Although small parts can certainly be buffed with a Dremel [affil. link to info/product on Amazon], and it's a good way to practice and learn, practicality probably demands a bigger tool than that for large parts.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey