Quote:
Originally Posted by titanic
What's sandblasting? Can you sandblast the exhaust to a mirror finish?
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Sand blasting is a method in which sand is propelled by compressed air at an object. No, it will not provide a mirror finish. It will provide a nice soft matte finish without machine marks (like sanding will leave), depending on the grade of sand you use, but it will most definitely not be anywhere near a mirror finish.
To achieve a mirror finish you need to spend some time with a buffing wheel. You could sand blast as part of the preparation, but then you would need to add 1 or 2 more steps of buffing.
Usually you start with a coarse step using a grease-less abrasive compound like Lea grade C (180 grit), then a coloring step using a hard green stainless compound on a soft cloth wheel. For a real mirror finish, adding a medium compound in between those two (brown) would help remove all machine marks.
It sounds Greek if you haven't seen it done, but it's actually pretty easy, just time comsuming. One of these days when I find some time (maybe over the winter) I'm going to author up a nice article on buffing metal.