Anybody ever polish an aluminum intake manifold?

CudaChick1968 said

Dang Benny, I hadn't realized your tumbler was big enough for an intake manifold! What're you using, an old washing machine tub or something?? :-D

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I dont actually have one. Previous employers vibra-tumblers.
In fact we once tumbled the interior of a motorcycle gas tank.
We put the medium inside the tank and strapped the tank to the outside of the tumbler drum. It worked :)