I CC mine. It works OK. It is easier to clean. Without anything they can stain pretty bad. Mine started showing some yellowing at the crossover ports (they are blocked). I ask a powder coating company about clear powder coating it. He said that unless it is polished small bubbles will appear when it is cured. This is due to air trapped in the rough surface escaping. I don't know how true this is, but I have no reason to not believe him, since he lost a sale.
I painted mine with aluminum engine paint, then used VHT clearcoat paint afterwards.Looks like new aluminum until it gets hot the first few times, then it darkens just slightly but still looks good IMO. It keeps it from getting pitted and ugly looking.I did my aluminum valve cocers this way also and I'm very happy with the results. Good luck Tony
My buddies experience with his car after he cleared the manifold was a yellowing appearance. He regrets it today. He said he was going to remove it this winter and have it powder coated but after reading above maybe he should check into it first.
We powder coat castings here at work all the time and don't have that bubbling problem. I will have to talk to our powder paint specialist and get his opionion.
I did mine it is awsome, real easy to clean up. i did my intake and my valve covers looks great, it's been about 2.5 years now and no yellow. I gave my intake and valve covers several baths and also an acid bath a couple of times to get everything out of all the little pours then shot it with some clear coat from the paint shop.
I used that POR15 glisten stuff, very expensive. I also got the spray phosphate stuff and prepped the intake and that stuff yellowed the manifold.
I also did the alum heads but I didn't use the phosphate stuff on the heads and they look real good and so far I've got 500 miles on it.
If you don't mind giving up the aluminum color, look into having it hard anodized. This is done on a lot of boats, particulary ocean going rigs. It gives it a very different sort of brown-gold-bronze color. I did my Victor Jr this way. When I first saw it I was aghast but now I like it. It cleans up very easily.
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