Hi Roy,
Regarding the Dents & very rough scratches.
Give Jim a call @ 1-800-726-8435 and he'll tell you the procedures for getting both the dents AND polishing the very rough scratches, as well!
I have his procedure for removing, "Corrosion & Scratches" - but I don't know if this is the SAME procedure he would want you to use on the situation you have.
Later & Have a good one,
Sharon