I dont know what it is made out of. (2006 Jayco Greyhawk 31SS). But it is dull and i have tried waxing it, also used Meguiars Ultmate compound on it, still dull.. Smooth, but dull. I would like to...
Most local canvas makers can make you a bra to snap onto your cap. I had a friend do it to a front camp on a Lance Truck camper. Looked good, easily removed and cleaned. Seems like that would extend the life of caps. But your right, why hasn't somebody designed one. Probably too many different versions.