Another thing I found, I think it's best to use the plastic only once. The overspray won't flake off right away; but it might a few days later. I painted two cars within two weeks, and there was some contamination in the second car from old paint coming off the used plastic. I have one more car to paint, and I'll replace the plastic before. Plastic is really cheap, so it's worth replacing for each job, in my opinion.