That Eezox is really nice on blued steel! Break-Free is great on rusted bolts and nuts under your mower, its lousy on firearms - especially autoloaders. ESPECIALLY .22 autoloaders! When I was doing general 'smithing full time(walk-in repairs and such), I used to LOVE those Break-Free guys! Fast 'n easy money, just toss their gummed-up Break-Freed stuff into the ultrasonic for instant repair! I still haven't found anything that beats a detail strip, crud removal with a brush in the parts washer(running kerosene), blow off the bulk of the kero & reassemble. If you MUST use oil, Starrett tool & instrument oil very sparingly. If you don't have ultrasonic and you don't want to disassemble that trigger group or whatever, grab a bunch of CRC Brakleen when it goes on sale at the auto parts store. Same as B/C Gun Scrubber and lots cheaper. Hose out that assembly, then blow it out w/ compressed air. Now it's clean and bone dry. Hit 'er with some Starrett M1, and blow out the excess. You're good to go.