My family business growing up was a body shop. I've done a lot of sanding and clearcoat in my time. I'm going to be constructive here and not worry about how you got there, but ways you might be able to salvage your playfield.
You can sand a lot of that clear off. I'm not saying that you can bring it back to the wood easily, but you can level it out so it's smooth. I forgot the name of the company but they did a presentation on how they restore playfields and after first cleaning them and sanding them, they put a thin layer of clearcoat down as a good base to start from. They start touching up over the clear. When they are done, they then clear over all of the touchup work.
Sanding the playfield level, then maybe working to correct the touch-ups may work out. Granted, you can't erase what's been done already, but some of those areas can be covered over with a new background layer and the original image built back up. The car, the kickback, the 1000 insert, all have nice solid background colors that can be matched, painted over, and a new image put in place.
I'm not saying that's easy, just that it's reasonable for someone with the artistic skills. It's not a a total loss IMO. You can still make it into a decent playfield.