At this point you have a playfield with mylar removed.
The next result is a vibrant and colorful playfield with missing art on the inserts and some paint lift
Trying to be as positive as I can - You just need to find pictures, or a scan of a good playfield and then produce your own decals. You can then look at clearcoating the playfield, or laying fresh mylar.
All is not lost !
You could even contact the producers of current decals sets - they may have enough numbers to reproduce a set ?
On the matter of decals and clear coating. Is this possible as I think I've read that inlays seem to react with clear coat. Am I mistaken??
Definitely an issue to be researched as I have not done this before - but I'm sure Gavin or one of the the other playfield experts will know