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Satin or mirror finish?

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Satin or mirror finish?

Old 09-11-07, 06:23 PM
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Satin or mirror finish?

I have some old grey painted Shimano cranks. The paint has many scratches, rub marks, etc, and the finish was never very good to start with. I'm thinking about stripping and polishing them like I've done with some other stuff. But I'd prefer a satin finish, not a mirror one. Searched the forum and found something about a lye bath, rinse and oiling, but not too explicit. Any opinions?
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Old 09-11-07, 08:13 PM
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media blasting with a fine compound or etching with a mild acid will normally provide a satiny finish
best bet is to use a few scraps and test with various immersion times in lye or an acid till results are what you're looking for.

I have made a few items with a satiny fnish using fine sandpaper, but it requires care to avoid continuous lines that will end up giving a brushed look, not a satin finish. use a circular strokes to eliminate the shine, then light north/south motions followed with light east/west strokes.

also, many clear finishes are available in satin.

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