When I first read the company literature (hype) on Kroil, I was excited and thought perhaps I'd finally found a substitute for Cabots' TASGON which was discontinued in the late 70's or early 80's due to its' creosote content. When I tried Kroil, I was very dissapointed and found that even after a long soak, screw threads were often still dry only a couple threads deep. I paid 12 bucks for a can of StrongArm spray this summer, and wish I could get my money back. I've had decent luck with ZEP, even on heavily corroded parts. Haven't yet tried the 50-50 acetone ATF mix, but intend to. I still have about a pint of TASGON that I only use for emergencies as it has to last the rest of my life. Very stinky stuff, but the best I've ever used.
