I have some mild rust in the bottom of all four doors (inside where skin wraps around). I have everything stripped, and the seam sealer wire wheeled out. I really don't want to de-skin all the doors to clean the rust out. What is the best chemical to "dip" the bottom of the doors? I am thinking of a pan full of chemicals, set the door in it, then remove rinse and wash. I don't have access to scrub, but I have room to rinse/wash and primer upon completion. Thoughts?