looked for a topic about this but didnt see one. i have marks on my roof, one the insde and i was going to ter some carpet cleaner like resolve but i was wondering if that would hlep or hurt the stuff that is under(over?) the material?

 

I take it you are talking about the headliner. I've never done one but this may help:

http://www.carcare.org/Interior/headliner.shtml