You are a braver man than I. I've touched up rock chips, I've repaired curb rash on rims (sand, Bondo, sand, prime, paint), but I would be way too timid to do what you've done here. Looks like you did good work, too!
Also - you didn't show how much area you covered with plastic. Like you said, spray paint gets
everywhere, so it would be important to "go overboard" in masking off what you don't want oversprayed. Any wider shots of the preparation?
Any tips on laying down the clear evenly? That was the hardest part for me when fixing my rims.