303 Protectants has several different versions like a convertible top system, two in fact, one for vinyl and one for cloths like Twilfast (but don't confuse them).
There is a version for all things boat. + yet another for fabric etc.
* Don't forget windshield wiper blades and like things, they will look better and last a lot longer.
And it's not really expensive like some of these specialty type products are in today's world.
Take a look for your self on line. You can get it at many auto parts houses and chain type stores.
We've had good luck with it on all kinds of things and it seems to last a lot longer than other products that we have tried.
Is just our 2 cents worth.