Johnvv,
The problems I had with the mixwax polycrylic were bubbles in the finish and brush strokes in the finish. I think the problems were related to the temperature, which was around 90F at the time. Spraying it with a gun let me put it on heavy like I wanted, without any strokes or bubbles.
I also tried Krylon Crystal Clear, which I have had decent results with in the past. However, I couldn't get the sheen to be consistent. Again, this might have been made worse by the outside temperature (it was probably drying far too quickly).
Well, I'm not sure I believe the originals had a clearcoat, although I have also heard people say they had one. My Moon Patrol showed no signs of clearcoat at all. However, ALL the paint was highly glossy.
I repainted the black areas on the insides and edges with Rustoleum Satin black, which was a very close match but just a tiny bit less glossy. The front, I repainted Flat black (unoriginal), but that was only because I had to do a lot of filling and patching on that panel, and I would never have achieved decent looking results if I used Gloss. I had plenty of trouble getting a good finish with Flat paint.
I clearcoated the sides to get an even sheen between the different paints I used. I used Satin because it was "shiny enough" and I already had it laying around. In hindsight, I probably could have used Gloss and the results would have been good with the spray gun, because I had the game on its side and put the clear on heavy. I was going for a decent looking finished product, more than a totally accurate reproduction, which might be more important to you. It now has a fairly glossy sheen to it, but it isn't as glossy as the original high gloss.
Good luck! It took so long, that I'm not sure I'll do another repaint. It'd be a lot easier and perhaps even cheaper, to just buy a real nice one from the start. Or, maybe I'll take what I learned this time and my next experience will be better.
Who knows.
TTYL,
Wade