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Old 11-23-2004, 03:12 PM
blackcote blackcote is offline
Amateur Metal Finisher
 
Join Date: Jun 2004
Posts: 99
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Default Edge defects/discoloration (pic inside)

I've been trying to get these parts to look nice for some time now, but my newbie knowlege doesn't seem to get me much of an answer I need. When I first tried this part only the side that I buffed took an anodize finish. So I thought there was a clear paint on it. But paint stripper didn't do squat. So I used the Anodize stripper and it took it right off. It came out so so but had some different color variations and didn't match the piece it was going to be mated with. So I stripped it again and repolished it cleaned and de-ox and this time I get what you see in the pic. I thought this would be caused by not so great prep work but It seems to get worse each time I try. What else can cause this? Can machining heat do something to the aluminum? The alloy is unknown billet aluminum. Can it be the unknown alloy? It seems odd that it's only on the edges if it was related to the alloy. I also get these spots which I think is attributed to the stripper causing pits maybe? (upper left of the pic)
Feel free to browse som other pieces here http://www.blackcote.com/pics/

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Blackcote
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