Removing scratches from the rear spoiler ... advice wanted.

Every car has its "Persian flaw," but this one irks me. A bird pooped on the car (in several places), and I always addressed the problem by laying wet paper towels over the mess to "pre soak" and then I could wipe it away without damaging the finish underneath.

Well, this time, a bird must have had a healthy diet of grit because that poop acted like sandpaper and put nice scratches into the finish before I could stop what I was doing.

It's not that obvious, but it bothers me. I don't want to attempt to buff out or polish out the scratches without knowing what WILL do the job right. I don't want to make a bigger mess trying to fix it.

Tips? Waxing doesn't conceal it very well.