"50% acetone & 50% ATF"

I will try that too -- THANKS -- WD40 seems so weak, it drives me crazy.

(Navy uses Tabasco by the flat on rusted bolts in the boiler room.  Not
sure if it is just that particular type of rusted stainless steel which
gets loosened by Tabasco or not; but I haven't had much success with it
since exiting the boiler room for the last time.