Here are photos of my efforts.  I bought a Herculiner kit that comes 
with a gallon of liner (used 1/2), two roller pads, coarse pad,one 
roller and 2" paint brush.  Liner comes in red, gray or black.  It is 
very easy to apply....you first rough up the surface with a coarse pad 
then paint in areas inaccessible with roller then apply first coat with 
roller.  Wait four hours and apply second coat.  If you wait longer you 
will have to roughen the first coat with coarse pad.  You mush be 
careful not to get on other surfaces because it is tough to get off.  
WEAR rubber gloves or you will be cleaning it off your fingers for 
days.  I think it looks real nice and it seems to be very hard.

https://picasaweb.google.com/larryhimli/VanagonTruckBedLined?authkey=Gv1sRgCK6r7q-gr-2JUQ