I've got someone who "NEEDS" his trailer wrapped and is taking off old pinstriping etc. The problem is that the paint is old and oxydized (powdery) and I told him that it's a problem. He doesn't seem to care and still wants me to do the job. What is your folk's experience on wrapping old painted surfaces that are chalky like that (if you've even agreed to ever do one). I did a primered only surface before and it hasn't fallen off yet. I know it's not within the perameters of "ideal surfaces to wrap" but will it stay?