I used the Duplicolor Bed Armour on my Metal Cloak fenders, worst junk I've ever used, I ended up sanding them down which was a pain as the stuff was so soft it just clogged the sandpaper (I should have sand blasted them)
I ended up buying some bedliner from Walmart (Canada) It was EZ Liner from Dominion Sure Seal Ltd. Worked great but I don't know if it's available in the US.
(I actually called up Duplicolor and complained about it, they didn't seem to surprised either, they refunded my money as the store wouldn't refund on used cans)
2013 JKU Rubicon - Commando
Teraflex 2.5" spring lift, Teraflex monster front and rear trackbars, G2 wheel adapters, Goodyear Wrangler MTR Kevlar 35 x 12.5 x 17, Superchips Flashcal, Warn Zeon 10, Smittybilt XRC bumpers front and rear with tire carrier, Metal Cloak Overland Fenders, Uniden Bearcat 980, Homemade side rails. 50" and 20" light bars and brackets.