Per my find:
Found at Home Depot, Kleen Strip brand and labled Phosphoric Prep & Etch. It's greenish in color, in a translucent plastic one gallon container, with a primariy yellow lable. It too was 14 a gallon. You can see my result but please post your results as I like the 3.7 a gallon. Three gallons would submerge about everything I have and for less than the Kleen Strip brand.
Corey,
As far a penetratingt ype deal, I'm an avent user of propane and PB Blaster. That is how I removed my door pins, among other things. After heat and cooling with PB, simple ping with a hammer and drift pin. Giver a shot let us know.
Brett
