It was kinda hard to get the tape to come off easily, if I did it again, I would use a razor blade on the edge to cut it way from the tape before removing it. I used Dupicolor roll on bed liner, 2 different kinds...
This type was cheaper, and I liked in better in my opinion, it was just a smooth rubberized type paint that you could texture how you wanted by rolling it on, etc... This was used on both bumpers...
[ame="http://www.amazon.com/DupliColor-Dupli-Color-Truck-Coating-TRQ250/dp/B000KMWCV8"]Duplicolor Bed Liner $20 [/ame]
This stuff was more, and had bits of rubber in the liner itself to give a texture, I didnt like it and it was harder to get the way I wanted it even though it costs more. It may hold up better, only time will tell. This was used on the rocker panels.
[ame="http://www.amazon.com/Duplicolor-Truck-Liner-Armor-Kevlar/dp/B003E1ZN2C"]Duplicolor Bed Armor $40[/ame]
As far as advice, its pretty easy, just mask it off, sand it, clean it, and go to town with the bedliner, I used a small paint roller from lowes and the texture was just right for me when using the cheaper of the too bedliners.