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Don't use durabak. I had it on my Cj-5. It sucked. Started coming of the floorboard of my truck about a month after I first laid it down, and it's TOO abrasive - it skins you pretty much on contact.
Don't even think about duplicolor, either. The roll on stuff is pretty much like a black paint with sand in it. The aresol spray-in stuff, however, is pretty good.
IMHO, the best do-it-yourself stuff out there is
HERCULINER. Anyone that tells you it's the same as durabak just doesn't know what they're talking about. I've installed durabak in my old CJ, duplicolor roll on in my friend K5, and spray on duplicolor my Yotas winch bumper. Two friend have herculiner in their sammys, so I've seen and used them all.
Go with Herculiner. It's thicker, harder (but not nearly as abrasive) and just plain better than the others. The closest thing I can compare it to is Line-X. It's not quite that thick, but you don't pay $$$ for a spray-in, either.
Also, do this on a weekend where you have the time to let it dry. I'd suggest at least 36-48 hours before putting the seats back in, and at least 4 days before really beating on it. This is for all the DIY liners - they take about a week to reach full hardness. Before that it doesn't take much to scrub them off.</font>