[bretcopsey]

It is not limited to parts that can be dipped, but the reaction is somewhat slow, and the surface needs to remain wet. For example, I'd love to do my cab, but I would need to find a way to keep a 'shower' going to be effective. I would also need to come up with a way to catch the runoff. I also would be leary of the runoff going down the frame and dripping where it may.

I have had success removing light surface rust using a scotchbrite over a bucket. But for the heavier surface rust I am dealing with, I don't think that would be an effective option.