JumboJet wrote:
Why would you remove the rubber mat?
I use the DualLiner system. Sidewall and fender well protected by hard plastic pieces and the rubber mat snaps into groves along the bottom of the plastic pieces.
I have had spray in bed liners on my previous trucks and like this setup much better.

www.dualliner.com
My rubber mat looks similar to jumbos. I think it is a Dee Zee brand. I bought it at Tractor Supply. It is a custom fit for my truck. Nice heavy duty rubber. It is heavy about 45-50 lbs (never weighed it). I can remove and install it myself by rolling it up and tying a rope or strap around it. I only remove it to wash underneath.