Bay Area, CA
It looks like the previous owner used something to hand polish / clean the playfield and that it did more bad than good to the areas that it was supposed to improve. Maybe it was able to react more easily with the surface already worned out by ball travel. The small surface dots in the areas that never saw a ball are probably droplets that were not cleaned and had plenty of time to react with the clear. It would be interesting to know what was used so we can stay away from that stuff. Naptha should be safe with auto clear but not Varathane.
With the playfield fully stripped out you should be able to polish this. You need a machine for sure.
