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Old 10-17-2012, 08:09 AM   #1
Captain Yesterday OP
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Painting an Aluminum engine?

I worried that 550 or 500 degree engine enamel paint might burn off on the cylinders and heads of an air cooled engine?

Anybody have any experience painting an air cooler engine?
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Old 10-17-2012, 08:27 AM   #2
Ricklesss
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I've had good luck with POR-15 engine enamels. Just like every painting job, proper prep is of key importance.
I don't think PJ-1 engine paints are around anymore...they were good too.
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Old 10-17-2012, 09:35 AM   #3
H96669
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No worries.....prep well and paint away. Did that so many years ago well before the Internet and so many choices of Hi-temp paints.Good old Tremclad Hi-Heat, been around for a long time that one. But for little touch ups I could do with a little paint brush it lasted very well.

Aluminium....hard to prep so porous in places. Good for paint adhesion but not so if you want to get rid of corrosion first. May require blasting with the right media.

There are proper primers for Aluminium such as Zinc Chromates but I only use them for touch ups where corrosion was present at first. Not a clue as to their heat specs but I did some on my engine right next to the exhausts, 1' or 2" no water cooling there, and finished with Tremclad Hi-heat, all still there after 3 years.

Nasty fumes them Zinc primers....read the warnings if you choose to use them.
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Old 10-19-2012, 08:24 PM   #4
LotaBikes
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VHT makes good engine enamels for high heat. I've used them many times with good results.
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Old 10-20-2012, 08:37 AM   #5
Mike Ryder
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Old 10-20-2012, 06:35 PM   #6
GreaseMonkey
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you have plenty of choices nowadays.

Just get a reasonable high temp paint and follow the directions.
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Old 10-21-2012, 11:13 AM   #7
Chad M
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Quote:
Originally Posted by Ricklesss View Post
I've had good luck with POR-15 engine enamels. Just like every painting job, proper prep is of key importance.
I don't think PJ-1 engine paints are around anymore...they were good too.
RIcklessssssS in Oregon
I think VHT is PJ-1, or at the very least VHT is a PJ-1 product.
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