1970 Swinger 340 Hemi Orange 4 speed

Sure seems to work well, how do you plan on using it on your body? It appears you need to keep it in contact with the rust for an hour or so and a large area seems to be a challenge unless you could dip it. I wonder if you could slop it on heavily with a big brush and cover it with plastic to try and stop evaporation and give time to do its job. Just trying to figure how to do large areas without buying a 45gl drum of the stuff.