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Originally Posted by rundymc
A question on mirror finishes using brasso, autosol and the likes
how do the chemicals accomplish their purpose- by 'filling' the marks on the surface, or by acting as an abrasive?
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They do so by acting as an abrasive. Brasso contains a superfine abrasive grit suspended in a hydrocarbon/ammonia solution which acts as a "lapping" lubricant. The grit just skims off the top rough layer of the surface and assuming the surface was reasonably flat and smooth prior to starting, will give a shine. When the liquid dries out you're left with grit flakes that just dry out and wipe away.