Quote:
Originally Posted by tinypanzer
Powder coating is the way to go for sure. I decided to repaint my valve cover, and I did an immaculate job. Sandblasted the surface, prepped it with TSP, put 6 coats of primer and 3 coats of engine paint. I waited for the perfect ambient temperature and humidity.
One year later, it's starting to bubble up again. Aaaaargh! Wish I had powder coated it!
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I'm not so sure. A guy I know powder-coated his valve cover red and man it looks awesome. But two years later it is starting to flake off. I was going to powder-coat mine but the guy at the coating shop here said they have not had good luck getting powder coating to stick to valve covers - he said they start to flake off after a couple years. He said to use high-temperature paint. So I am going with the PJ1 high-temperature motorcycle exhaust flat black spray bomb paint. I live in a hot climate so I need all the heat transfer and cooling I can get. Flat black is the best radiant emitter there is. It would be better to use a catalyzed two-part paint but I am running low budget these days. If the PJ1 starts to flake off, I'll just repaint it.
FYI, only paint the outside... MB puts some kind of gold-colored coating on the inside of the cover and it was flaking off too to so I had it all sandblasted off.