Need to be wary of what it is doing to the metal, and how much it is eating "the good stuff" away. I researched its use years ago when I was cleaning stuff for the Dart.

Guy over on BBD threw a set of rods in EvapORust (not sure what it is made of), but they had matching wrist pins (press in), he removed the rods, and the pins fell straight through the small end...

Disposal seems like it would be a PITA too. But to someones point above, once neutralized, is it really any different than the contents from a parts washer?