I have heard both answers to these questions.
Is it aluminum or an alloy? Aluminum can be anodized but some alloys can't.
Anybody got this kernel of knowledge in their arsenal?
Thanks

I'm not sure if it's all aluminum or an aluminum alloy, but it's not anodized, cuz you can use 000 or 0000 steel wool to polish them, which wouldn't happen if anoodized unless you stripped the anodizing.


Tom
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I don't know for sure but it seems like a very porous aluminum. I have a couple cores if you need a sample to test. Just the cost of shipping.

I think it is aluminum and magnesium. Some people have powder coated them.

It's magnesium, the factory finish chromium pickle, giving it a slight goldish hue for it's first 5 minutes of life.

Makes sense. The cericote paint that ben uses on his repaired 911 fan and housings would look nice. Not cheap but can be done at home vs powdercoating. Polishing mag is pretty futile. I could vapor blast but it will still go back to natural by the time the engine goes back in the car.

I've had OK luck powder coating them.
You have to blast and powder coat them same day, the sooner you PC the better. I would imagine the cericote would be the same, blast then coat ASAP.

Mag is why when you see a shroud that's seen lots of salt it looks like the tin worms have been munching on it.

My fan shroud is made of fiberglass.......... My fan housing is metal of some sort. Responds very well to a glass bead blast.