I don't have to apply heat whenever I do thin metal items, it is just when the metal part is so thick it just seeps all of the heat away from the area that is being polished. Aluminum is the worst, it cools down the quickest. (I think) Steel is easy. My main problem is insuffecient wheel speed (I think), I polish with 2480RPM's on 4" wheels. At this speed it just doesn't create enough friction. (I think) I know that when the item is hot i have no problems. I also have a bench grinder with a buffing wheel on it 8", I haven't been able to test it out on the larger items to see if it works better, (Weighs at least 30 lbs). I plan on investing on something that can spin at about 4500RPM's and fit (2) 4" wheels on a shaft. (I like 4" wheels because they are the most versatile for the work that I do) What I just wrote is all out of order and jumbled together, just can't organize my thoughts. I will try to get some pictures to you in a few months and see if I can catch some of what I am talking about on camera.
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