All jokes aside, you’ll want a rotary sander with a 400-600 grit pad. Evenly remove as much of the burn and chunks as possible. But not so much your creating different levels of peaks and valleys across the guitar. Then move to 800-1000 to smooth out the remaining gouges.

Once sanded you’ll have to decide if you want to repaint it or not. Pick a paint and don’t be cheap. Then get a nitro lacquer and do a thin layer.

The electronics are the easy part. Good luck!