I recently had my glass removed, roof repaired and repainted on my '68 Wildcat. I was unable to get the headliner done at the same time and am now ready to send it out to the upholstery guy to get it done. Here's the question: I recently visited a guy that has a '67 Wildcat that looked nice (with an older repaint) and noticed rust above the c pillar near the drip rail coming from behind. I looked at my roof, sans headliner and I can see a light rust coating and tar paper falling off. I want to use some kind of a product That I can spray on before the headliner gets done. Presently, there is no significant rust to speak of, only light brown surfaces that almost wipe off. Something like WD 40 just to act as a rust inhibitor to make sure it never rusts. Any product advice would be helpful.