We just got a pallet of 100 older M3 frames. They are GROSS.
What is the best way to remove:
-Ink
-Gunk
-Tape Residue
-Burrs in the Channels
i know there are lots of posts about this, but I figured having an end all be-all list might be good too!
If you want to blow your mind, find somebody with a dry ice blaster.
Costs a small fortune but the crud, all of it, just falls right off.
Physics behind it is really 'cool', sorry I could not resist.

Coefficient of expansion of the crud is different from the mass associated with the frame and when subjected to intense cooling crud just disappears and you end up with a fine powder of crap.
No justification to own one but I really want one just out of "cool tool lust".
~Kitson
He who dies with the most 'toys' wins!