its not a spray can, its like a tub....pretty much the same can of gallon of paint you get from home dept...a gallon container thing. its in one of those...so its definatly a roll on, but i dont know how the durability is and how good of quality it is. i believe it was like $35 for 1/2 gallon

 

Have been looking at the herculiner http://www.herculiner.com/stores.html and Durabak http://www.durabakcompany.com/automotive.htm
The durabak has several colors to pick from if you want to try and come close to the color of your truck.

 

I paid $550 for Line-X over the railsand love it. Lifetime warranty. Looks amazing. Holds up great! My friend got a Rhino brand liner and his doesnt look nearly as nice as mine and I'm not sure how much he paid for it. Just my 2 cents

 

Here's a good write-up on a 2nd Gen member (CowboyBob) that did a DIY job with Herculiner. First link is to his post, second is to his write-up.

https://dodgeforum.com/m_1101510/tm.htm

http://www.cowboyplayground.com/public/bedliner.doc

 

Read the post of the DIY, he did an OUTSTANDING job of documenting his results. In his opinion, he said it's not worth it for the time you spend doing it, then doing it over. Also with a lot of the spray in liners you get a lifetime warranty...or at least they used to. Last time I called for a quote (little over a year ago) it was 375 - 450. I'd crap myself if they told me 700.