The stuff I used is called paint defender by 3m and it's sold just about everywhere. I bought mine from autozone and I want to say it was like $20 or so but I have plenty left after spraying my two fenders. Should have enough to do it at least once or twice more. I'll include a picture of the can and its pretty self explanatory after that. In comes in a box and has all the instructions you will need plus a link to a very helpful video.