Has anyone used a diy bedliner material to paint the entire truck? If so whats the best stuff to use.

 

Monstaliner is probably the most recommended.

 

Monstaliner is what I used. I would do it again.
What color are you thinking of doing?
More pics here https://www.yotatech.com/g/album/2881779
...and here https://www.yotatech.com/g/album/2882294

 

I'm going to paint it white. Looks like your truck came out nice. is this stuff hard enough to be scratch resistant?

 

Much more scratch resistant than regular paint. I do carry limestone blocks in the bed that have made scratches when they are thrown in...
Its been over two years and the Monstaliner still looks brand new no fading.