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<p>[QUOTE=&quot;Just Carl, post: 162245, member: 4552&quot;]If you are concerned about scratches on a slab try a buffing wheel. Use a very soft buffing wheel at a slow speed if possible. This, if done gradually, will slowly and almost insignificently melt the plastic back into a smooth clear material. I&#039;ve found that putting such a buffing wheel on a bench grinder has to much speed and is also rather dangerous. Same with most one speed drills. What I did is to make a reostatically controlled portable receptable, mount a one speed drill to a work bench with the buffing wheel in it and turn on and lock the trigger in place and use the speed controller to run at just the right speed. </p><p>I first noticed that this is a possibility when I used a saber saw to cut open a slabbed coin. At to high a speed the plastic just melted back together as fast as I cut. This indicated that the plastic is soft enough to be melted slightly with a slow buffing whee. It works. What was weird was after I removed some scratches from a slab, I ended up cutting it open anyway.[/QUOTE]</p><p><br /></p>

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