Herculiner bed liner
For those on a poor budget (like myself) and don't have the money for Line-X. Go with Herculiner, this stuff is great. You have to do a good amount of prep work if you want it to come out real good and last. I got the kit (a gallon of bedliner, 2 inch brush and roller I threw out), a 4 inch $2 brush from walmart and painted it on..
I would suggest not to use a roller its a complete waste of time, just get a 4 inch and 2 inch junk brush for tight/cut in spots. The painting really doesn't take to long I did everything in one day just remember to sand down the bed really good with 60 grit sandpaper so the liner can grab and avoid peeling. The gallon got me 3 coats.
It takes about 8 days to fully cure but you can start using it lightly within 24 hours. Its strong as hell after a week I took a very sharp dagger and tried to dig into it just to test.. nothing peeled.
Not the best pic but its what I got.