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Post by lyotehunter on Feb 13, 2010 10:37:28 GMT -6
jb is an abrasive so it will come out black because ti is removing metal
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Post by lb on Feb 13, 2010 15:23:53 GMT -6
Yes, an abrasive if your definition pertains to a substance that wears away another material. Water would fit the same definition, given a little more time, if you have ever heard of the Grand Canyon?
I think it might be a bit more accurate to describe JB as a grade of "polish" since every polish I can think of is ever so slightly "abrasive" otherwise it wouldn't accomplish very much.
There is a chemical action going on due to friction and heat but the dark color is from the steel and the amount abraided is probably not measurable with a calipers or on a scale. It's likely just a little more abraisive than Skippy peanut butter.
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Post by trappnman on Feb 14, 2010 7:31:31 GMT -6
you might look at Motorcycle chrome polishes- such as Mother's- its impregnated cotton, and is very gentle, and the best thing I've used to take off burnt oil, etc
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Post by stickbowhntr on Feb 14, 2010 17:47:12 GMT -6
getting baked on copper out is not going to be easy. Rem clean or liquid copper romovers are best.
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Post by trappnman on Feb 15, 2010 7:48:43 GMT -6
taking off baked on oil on chrome pipes w/o scratching chrome is no easy matter either- but have no idea on the copper- just suggesting a very good polish that is gentle enough to use on chrome.
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Post by trappincoyotes39 on Feb 15, 2010 8:23:02 GMT -6
JB is an abrasive but works well for removing carbon, copper is far easier to remove than carbon build up. The shiny black is your carbon/powder residue from shooting the gun, you will notice a shiny black versus a dull black/gray color and you will notice it much heavier the closer you are to the chamber. If it concerns some then don't use it, but use a bore scope on some of those you think are trully clean with sweets, butches and the foam types and see the differance JB can and does make for clean and accuracy.
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