try this...
jack up the car, remove the wheel, jet wash the caliper until it's free of debris, wait till it dries, remove all flakes/loose lacquer, mask the caliper with cardboard, spray entire caliper with new lacquer (repeat for several coats) and then do the other side.
Now your probably thinking it'll be a bodge or whatever but give it a go and see what you think I seriously could not tell where the lacquer had peeled in small patches before.
IMO it's worth a go as it won't take long, worst case it's only a bit of extra lacquer to strip when you get them resprayed etc.