I actually use it on things not truck or RV related...
It's great on deck steps. That Wolmanized wood, when it gets wet, gets slippery. it works well on that. Step ladder steps too. I even built a ramp for our old dog to get in the house (up the front steps) and used it on that so she had traction when it rained.
The sticky side is very sticky so make sure you have it the correct size and where you want it before you peel the paper. Once you stick it down, thats it.