After doing some searching, I can't seem to find enough info on a vibrator/tumbler. I'm going to get my hands on the 5 gallon vibrator, because I've been told it's the better one for nuts and bolts. I'm doing a good job polishing a bunch of parts, and I'd feel REALLY bad putting ugly nuts and bolts back on. I'd also rather not sit there with a dremel and hit each one either.

I will if I have to, but would rather not.
I've heard that the green pyramid resin pieces are good for removing rust from bolts w/out messing up the threads. I've heard about corn cob and walnut.....I don't know where to go to actually SEE a picture of the finished result. Can anyone help?
Cheers in advance.