I have noticed some rust around the jack point plugs on my 1989 300te... Pulled the plugs...the rocker panel coating had worked loose, rust has begun underneath it...pitted, not broken through. I think I can STOP it now if done right. How do I neutralize the rust, what do I coat it with, and what is the stuff that is on the rocker panels (pliable coating) that I can re-apply???