The only roll on available on the shelf is herculiner. Duplicolor is alright, I use that on my frame and sliders and whatnot, so when it gets scratched, just spray it on again.
I have found that the Herculiner is much thicker, for example, if it dries on something, you can peel it off in one continuous sheet that is fairly thick, the spray on stuff just kind of flakes off, more like paint than a rubber product.
I do understand that many others are available on the web, but for instant gratification purposes and bang for the buck, 1 gallon of herculiner can do all of the cladding on the VX and the hood insert, with more than one coat.
Just for curiosity's sake, What would it cost to do all the cladding and hood insert on the VX with Line-x, in black, with the UV inhibitor?