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Old 03-11-2013, 09:25 PM   #1
barko1 OP
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How to paint Guzzi V11 valve cover?? adhere

My 03 valve colors have discolored and it drives me crazy so I thought I'd spray them with some 500 degree satin black but as soon as I shot it on it spotted up., obviously incompatible . The covers are aluminum, probably an anidized finished, what do I need to do to make something adhere?
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Old 03-11-2013, 09:54 PM   #2
John_L
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clean them very well, then scuff them up a bit. sounds like you have some oil or some other residue on them. That is where the spots are coming from, the paint won't adhere to the oil.
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Old 03-11-2013, 09:58 PM   #3
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I'll shoot it again as I do hit it with some 400 sandpaper but not sure if that'll do it. I'd try the self etching primer but not sure how well that would hold up to the heat. Thanks
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Old 03-11-2013, 10:05 PM   #4
John_L
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How hot do yours get? I can touch mine on my 2001 V11 sport after riding for hours. Not sure what color you are going for but I've done header with BBQ paint and it has lasted for years.
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Old 03-12-2013, 07:13 AM   #5
kantuckid
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If the original finish is still there then it can be properly cleaned with a detergent or other degreaser and scratch it up with a ultra fine scotch brite type pad. If there are spots where the bare metal shows best to prime it with an etching primer for adhesion on alu.. There are lots of black engine paints for heat out there are other choices besides BBQ paint. TSC,box stores,etc., has them in rattle cans.
Another reason for kick out or fish eyes can be that the metal was clean but too cold. Make sure to warm the metal and the paint ,esp., in a cold shop.
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Old 03-12-2013, 08:03 AM   #6
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Thanks all. I'll keep cleaning and then use some self etching primer. I'd like to use the 500 degree spray can I have, a nice satin finish. The BBQ often is pretty flat. I have a can of that that I could put in the sprayer. Used it for the mufflers on my old SL350.
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Old 03-13-2013, 08:34 PM   #7
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I clened, sanded with some 800, shot with self etching, and now have added a couple coats of Satin and it looks good. Waiting for some new gaskets and all will be good. Thanks
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Old 03-13-2013, 08:39 PM   #8
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cool, let's see some pics.

Quote:
Originally Posted by barko1 View Post
I clened, sanded with some 800, shot with self etching, and now have added a couple coats of Satin and it looks good. Waiting for some new gaskets and all will be good. Thanks
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