rust dip threads that i can't seem to find...

anyone remember the name or a thread that describes a chemical rust-remover dip? for some reason i'm thinking it's from texas, maybe comes in gallon pails.
searched a couple different ways, but struck out.
thanks n'at.

 

Rust Beeter?

 

Evapo-rust. Google it

 

molasses?

 

ultra-one rust remover.............bought a gallon and the rust just walks away.

 

Vinegar