nino,how will a clear coat remove the ball swirl?for the younger members can you please explain.plus ballswirl,cracking,planking,shrinkage etc

Clear coat won't remove the ball swirl, I'm afraid ! Hard work with Chux Magic Eraser and alcohol will be the first step. This will take time, and might remove some paint. It should improve the playfield.

Cracking and planking - not much can be done with the natural aging of timber and paint. The artwork is incredibly detailed, there won't be any touch ups. I MIGHT do the white areas with an "off white", or a yellowed white I found in the Jo Sonja range.

The clearcoat that I want to attempt will simply arrest any further playfield wear. It is all about preserving the artwork under the clearcoat. I'm hoping it will freshen up the colors a bit as well. It will be "trial and error", so this restore will hake a fair bit of time as I want to practice on a spare playfield I have picked out.