BRD HNTR has the Herculiner on the inside of his rig and we are kind of split on it. While it is tough and will protect against just about everything the coating is a little rough, so fine dirt tends to stick in giving it a sort of all ways dirty look. We did the brush on application, not using an airgun so that may have affected the result.
I would get a couple of samples and go with whichever one has the smoothest finish.