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Restoring an aluminum intake manifold
I picked up an intake for pretty cheap and I'm looking to bring it to spotless condition if possible. No damaged threads, no cracks, none of that. Just some oil spots.
I am not sure about blasting it, because that would leave the surface porous and it might collect crap again. If I do, I guess walnut shells are the best bet?
How would you guys do it? How would you protect it from oil, gas, and grime?
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