I've been looking into lining my cladding, hood insert, and that little piece above the isuzu emblem on the back door and possibly a permanent bra. I've looked at the Durabak brand and they say 1 gallon covers 60 square feet. Anyone out there done this and could give me a rough guess as to how much i'd need? Is there another brand that is better? I'd like this to withstand offroading and rocks scraping it and all that. How well does this stuff bond to the plastic? Or would i be better off taking all this to a rhino lining place in town? Any insight and wisdom would be greatly appreciated.