I am prepping my hood just to get something done and got it sanded down and smooth. I sprayed on a couple of coats of Rustoleum primer just to protect from the elements while I put on filler in a couple of small pin holes and dings. My question is, when I get ready to put on the final primer, should this stuff come off. I figured that it'd be okay to leave it. Anyone have any experience with this? Also, it was not an aerosol can. I mixed with thinner out of the can and sprayed it myself. Here is the product description.