I'm making this thread to say that using efferdent to clean your pipe, (one of the lady's on this site suggested it, I can't remember who.) works amazingly. My pipe "The Candy Cane" was dirty and needed a bath. I soaker her in some efferdent and after a little while shook the ziplock bag and then rinsed her off. I had to touch up the tough spots with a pipe cleaner but they came off easy. And I have to say, Damn. She looks like the day I bought her. I should have done before and after shots to show you.
I don't know how well this works on metal pipes because I never tried it, but I assume it would work well.. And no I wasn't saving the resin but it wouldn't have been hard. Just using a coffee filter.
Okay I'm done blabbing, just letting everyone know it works great.