Hi Doug,
At Home Depot, I found this great spray-on rubber that comes in black and red... "Plastic Kote." About $5 per can. It's advertised for marine and automotive use and I am going to spray it on the front lower half of our
Bigfoot 19 to act as a "dirt and rock guard." The way I see it, it can always be sprayed over as needed and will not require drilling holes to affix it (as it looks like most of the vinyl covers do). Hope that helps!
Let us know what you end up with.
Val