Playfield came up pretty shiny after all that work, well done. Treasurecove in the US sell a mylar polishing kit - I've never tried it but a few here have commented on good results.

Actually this was the place where I got idea to use these scotchpads. But next time I will definetly get that kit that can be used with power drill. Actually one of my Finnish pinball mate was doing also full restore to CBW at the same time and he did use some polishing kit and said that it worked like charm.