I sure am enjoying your truck and fine foto-graffy anyway. That no guaranty if vehicle is repainted is BS. I can see if the paint has peeled off with the liner, but if the liner has peeled from any paint it's a problem with the liner or the prep. I've had Line-X in a couple trucks and they told me about some failures for state roads new trucks. They learned they need to sand the paint. He didn't say whether the re-do was on them (warranty) or it was a paying repair, but they fixed it. My jobs were pretty detailed using a lot of the wire embedded masking. Racks were powder coated with Line-X on top and inner edges... around a little onto the outter of the sides. That would be a prime situation to peel from the edge, but I only had the truck a few years. It did hold up to a lot of abuse... even this!
Flipped it on it's lid and it still looked good. The tonneau I had made out of Herculon (I think?) trailer tarp material they use on covered wagons (flatbeds with sides/tarp). That held all my tools and didn't tear (Table saw, compressor, miter box, nail guns, screw guns, sawzall... you name it, a whole bed full.
Sorry to hijack, but it's been fun talking with you. Would you consider a tonneau?