Another something fairly cheap you might think about if you are like me and your rhino bed is getting scratched, which without a doubt if you haul a cooler or anything else for that matter it is. Herculiner a great product that works great for looks, gets rid of some vibrating noise from the bed, and holds up great.
I bought my rhino new in the middle of 2008 after only a couple rides my bed was getting perty scratched up due to my cooler and tool box. So as always I did a little research and decided to try the Herculiner truck bed coating, Which I recommend to everyone because I do not see any down sides to having a good looking bed that keeps the rust away. Installation is fairly simple also just follow the directions on the can, don't skimp on the prep work, and I feel you will be happy with the end results .