Peanut butter isn’t only for sandwiches! It can be used to remove stubborn stains on your vinyl cover, like pitch or tree sap. Using sparingly, rub the peanut butter into the surface of the stain on your cover. For difficult stains, let the peanut butter sit in the sun for a few minutes before removing. The peanut butter will act as oil on your vinyl cover which will help release the pitch or tree sap.