[njsteve]

FYI, depending on how long it is soaking, the evaporust and safestrustremover will remove some types of plating, like the black oxide on bolts and the grey phosphate on the hinges. I once soaked a semi-rusty brake booster in the liquid and it washed clean the yellow cad plating on the booster, down to the bare metal. It is wonderful stuff on bare metal items that have no other preexisting surface plating. It won't affect paint unless the paint is hanging on to a rusty portion of the metal and then it will seap underneath, dissolve the underlying rust and the paint will float off in that spot.

Don't use it on pot-metal or cast white metal as it will get into the pits and then start dissolving the metal away. I learned that the hard way on a portion of a lower steering column. After soaking too long, it looked like it developed the automotive equivilent of smallpox.

P.S. Heat up the liquid and the part and it works much faster. Piror to dipping, I usually leave the item to be soaked and the jugs of liquid out in the sun a few hours, or I use that aquarium heater in the bucket. 75 to 80 degrees is fine.