Well all sarcasm aside, i have tried the spray can of bed liner like from wal mart and was nothing but frustrated with the results. there is some bad pictures of it in the gallery:
http://gallery.caraudio.com/pp/showgallery.php?cat=500&ppuser=12540
And the stuff doesnt go far at all, i used 3 cans just on the front of my box and the stuff isnt cheap! i just did the front and used black spray paint on the rest, it may not look to good, but it is my first box, so oh well. But here is where i went wrong:
i srayed it on at first to thick and it started to not look level, so in a panic i grabbed somthin and started to smear it around to get it to look flat, and succeded part way but then i had places where you could tell what happened, but by that time it was drying and i was sol. so if your gonna try it i might suggest getting it by the gallon and using a roller or something cuase its like 17 bucks a can for the spray stuff i think, and a can will cover about half of one side of your box with 3 coats. getting the box all ready and taking it to a bedliner installer might be the best bet, and prolly cheaper, and more durable, and itll look better, ant theyll match colors, ah hell, why didnt i do that?
Where do you live by the way if its too small of a town there might not be anyone that does it just start callin around.