Dries pretty well. If you are working and keep rubbing against it you might get a bit of gray. Not too bad. It has really prevented rust, and I only touch it up once or twice a year.
I originally did mine with VHT spray after sandblast. Had rust speckles popin out all over in a couple years. Last summer I brushed this stuff on with it in the car. Looked good. Will have to see if it holds up...