So it will etch where the part is at the surface... hmmm. Looks like the barn cleaning phosphoric acid I used to strip a couple fenders. I could feel the line with a finger nail.


You can see the etch lines in the fender, where I only had the bottom submerged to dissolve the rust in the pits.


https://hosting.photobucket.com/albu...unds&crop=fill

Has anyone tried Evaporust in a heated ultrasonic cleaner?