This is a picture from another forum member here.
He had his fenders done with Line-X.
Maybe he'll chime in and give you some additional info.
I'm currently debating on having another vehicle of mine completely sprayed in Line-X,
but I don't have all the info that I'd like on it yet.
You might keep an eye on the thread though.
Some info might pop up that could help you as well.
Here's the link:
Any Painters Out There?
Good luck, and welcome to the forum.