Hot Rods White Vinegar - Rust Comes Right Off

Right on.
I'm gonna try this myself.
Been strugglin (soldering) with a couple of leaks in the 60 yr old radiator, so in dispair, donkey me threw in some leak stopper dust thing. Leak didnt stop and now I've got the temp gauge reading just a bit higher than middle scale. Since I gotta pull it out again to properly weld it (again), I'm gonna let it sit with white vinegar for a day or so to see what happens.
Thanks!