justanolddigger
Posts: 434
Joined: 9/16/2008 From: Rapid City MI Status: offline
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quote:
ORIGINAL: Staunton Dan Is 500 grit aluminum the same as or similar to 600 grit silicon carbide which is used as a cutter? The problem that I am having is that when I use a 2 step process (cut & polish) the 1st cuts properly but the aluminum polish can't polish the glass after it has been cut. There is always a film on the bottle from the cutting process even after 3-5 days of polishing with aluminum oxide. If you use 600 to cut with, you need to use a 1200 grit in a second stage, and then a third stage with polish. The 600 is too coarse to use and then just polish. If you could look at your bottle under a microscope, the 600 leaves tiny scratches in the glass that 1200 can take out, but polish will not. That is the hazing effect that you are seeing. I only use 600 on my worst bottles, then 1200, then polish. Most bottles without heavy scratches or etching will do well if you first use 1200 to do a light grind, and then follow up with a polish.
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