I recently finished a thorough borescope inspection of my car (72 CSi) I do not have any external rust or rot. I did find some patchy surface corrosion (using the borescope) in the area just in front of the doors and where the windshield support meets this area. I gained access through some previous owner installed front kick panel speaker holes, I also travelled up into the area from the wheel well. What I am wondering is what I can do (if anything) to the areas since I can't really attack it by mechanical means short of removing body panels. Should I use a rust eater/converter product.