Sounds like you are talking about pin stripes. If so, 3m makes an eraser wheel that you put into a cordless drill, this will take the pinstripe right off.
I just got done working on a Dodge Durango, that I used Wolfgang TSR 3.0 as a 1 step.
I used the TSR with a orange lc pad. I am very happy with the results.
I will let the pictures speak for...