I don't think heculiner is a good choice, for several reasons. Mostly because of how coarse it is, where your boots rub along the side of the frame by the pegs, it would just cheese grate your clothing all to hell. You'd also have to do a lot of prep work or clean up work because anywhere that has a tight fit on the frame, like the a-arm mounts, engine mounts, and pretty much every bolt hole would turn into a big pain in the ass with that thick gritty liner in there. And especially if you get the cheaper spray on stuff, (i'm not sure about the herculiner brand product) it really never impressed me with durability, it chips just like regular paint. Touch up would also be an interesting task to pull off, you'd never be able to get it to look right again after it gets scraped up without stripping off an entire section and re-lining it. I think paint is the way to go. It's cheap and easy to patch up, so it's not really a big deal if it chips or wears off every once in a while.