With! The black looks good against your white paint..which looks great too!
I have aluminum diamond plate caps on my bed and like them except for the sharp underside corner which can draw blood. I think they look naked without them

 

im gonna repet every one and say WITH..

 

Yea i like it over the rail like that. I did the same with the rhino liner. It came out really nice.

 

With... The over the rail spray on liners are good too.

 

I like the spray on the railing myself

 

i LOVE and i repeat LOVE my spray in... just the look of it makes the bed look 10 times better..and sprayed over the bed rails...looks lot better then a drop in bed liner!!!! just something about the spray ins make the truck look like its worth ALOT more .. i dunno... just something about them!!! either way a bare bone bed looks ugly... just doesnt look right without something in thhere... im for keeping something on the bed rails!!!!

 

looks AWESOME with the caps

 

same,same stick with the caps

 

Id say with if you dont spray the bed.

If you get the spray in bed liner have them spray over the rails.

I did that with my ranger and it was great. I never worried about scuffing the paint when i was miving things. The overlap on the rails was the best. I think putting plastic black bed rails on over the rail sprayed on liner will look silly. The spray on the overlap will be far tougher than the plastic.




You can see i went way over the rails. That was just due to damage to the paint done by the last owner. But it was very handy with that much overspray.

good luck and post up some pictures when you do.

 

I want a spray in bedliner now... Anyone know how much those run?