POR15, undercoat, or sprayon bedliner?

Nice, so Chassis Black must be the tough stuff. Would be nice to have a super durable coating on every damd thing and get by with out clumpy looking undercoating..

chassis black is what gm's used show me how well that worked i don't know of any gm guy that hasn't layed awake at night listening to his car rust

undercoating does not have to be clumpy and it doesn't have to be put on heavy that's just the mantallity of the people hired to be a rustproof junkie it's called "i'm just putting in my time," or "what do you expect for what they pay me"