Update,
Coin door painted and re-installed. Headboard re-attached and circuit boards and power supply electrical looms plugged in.

Pulled the cover off the playfield, and thought bugger it - it needs to be stripped and cleaned properly.

My question -  it obviously has a mylar sheet added to the top of the playfield and around the bumpers, it's dirty and faded, more so than the unprotected areas. See picture

Will cleaning this, bring it back to life, or do I need to bite the bullet, remove all the mylar and polish all the playfield. Do I then need to re fit mylar? Or home use don't worry.

Any thoughts greatly appreciated.