I had mine resprayed because of maybe 2-3 tiny chips which had very small bits of rust (smaller than yours).
It does sound excessive maybe yes but as I wasn't wrapping my car I needed the finish to be decent so had the whole roof done as blending in one small area would never have worked.
If you're going to cover it up with a wrap and don't really care what it looks like underneath then you could always just take the rust spotted area back down to bare metal yourself with sandpaper, then spray with primer, followed by a base coat & some lacquer. Then with wet & dry sand paper just go over the whole thing to make sure it's nice and smooth.
It'll never blend in and will look rubbish but if it's under a wrap you'll never notice it obviously.