Well let me tell you - Naptha + a paint pen = DISASTER! I started to give the playfield a quick wipedown before starting the clear, and the naptha dissolved the black paint! It smeared all over the place! I was able to recover, and get rid of most of it. Some black got into surface cracks, but it is not too noticeable.
So far, I put down 2 coats of polycrylic. The 1st coat was very thin. I sanded it down with a fine grit foam pad, and laid down a shiny 2nd coat. I am not a fan of the way polycrylic goes on. I have used the standard poly, and the polycrylic is much more 'aerosol-y', for lackof a better term. Another issue I encountered was that the low spots near the flippers that were down to bare wood were substantially sunken compared to the rest of the playfield. I sprayed some clear into a lid and dabbed all the low spots full. I'll let this coat dry for 2 days before sanding and doing it again.
Oh, and one last issue. I left the touch-ups as-is. Remember the hot pink non-matching magenta? Well I also mentioned before that the Magenta reacted to the clear much more than the other colors. It reacted so much, that now it is substantially darker than the original magenta. I'll live with it...
Pictures to come tommorrow.