Blue Chips link=topic=2719.msg19626#msg19626 date=1311517190 said:
I drug home a surface grinder whose ways were a sludge of oil and rust. Naval Jelly converts the rust to iron, and deposits it... where? So I tossed that idea out.
What worked great was a bit of washing soda, a terrycloth rag, short length of angle iron, and a battery charger. Sucked away all the rust and put it in the rag, cleaned the ways right down to the scraping marks.