Thanks for the advice Nino! once again you were spot on, mylar (contact) came off easy with the hair dryer and Isopropyl alcohol and a plastic scraper for the adhesive. I cleaned the dirt in the grain out with a magic eraser then reset the inserts. For the black outlines I used a acrylic paint pen then brushed around each one with Cabothane clear to lock in the paint. Worked a treat.

Here are some pics of the playfield in clean up mode.

Cheers: Brettski... :)