Well, I didn’t know about the clear chip guard. You mentioned Plastidip which I looked into but I wasn’t convinced it would actually protect anything from stones. I remember a friend used it on his motorcycle and it ended up with chips in the plastidip at least.
None of the sprays I looked at appear to provide a clear finish so that’s why I’m looking at other options first. I should probably try to cut a template first then install that 3m stuff again.