To start with, I took some glaze compound and put a light coat of it in the worst worn areas. I sanded that smooth, and painted all the worn areas with a few coats of black paint. After that, when looking at it and running my hand over the middle it seemed pretty level to me.
Then, of course I painted everything. The yellow is hand painted, mixed from 3 shades of gold/yellow Folkart paints. The other colors are basically just Elmers brand paint pens. I was very surprised how close the red paint matched, and I didn't worry about the orange since there wasn't any existing orange left in that area to "connect" to.
The asteroids were painted by putting a couple of dots/lines of white and blue paint next to each other, then connecting them and drawing the rest of an asteroid shape around them with black. The white trails were made by mixing light yellow and off white, then dipping an old non-working ballpoint pen into the paint and drawing the trails.
I was considering covering all of this with Acrylic Lacquer. That is what was originally there right? I would clearcoat, but it's not appropriate for this era of machine, and the process scares me anyway.
I actually can't imagine playing on this artwork after all this work I've done

.