So, according to the guide I found the "thin" waterslide paper. Well, on my JP this was not the correct choice. It left the inserts about half the thickness shallow of the waster paper. So now the two letters "C" and "S" in CHAOS are indented a bit. I thought 3 coats of clear would smooth it out a bit, it did not. When I sanded the edges of the raised portion around the lowered decal got sanded too much and I had to do additional touchups.
I am now considering spraying some clear in just those areas to let it build up a bit, then re-clearing the whole thing and sanding down again. I only sanded with 400/800. The rest of the playfield looks awesome.
On another note, the laser printing on the waterslide was not dark or consistent enough to match the other characters. So I ended up painting over the letters with black acrylic. It looks much better in terms of transparency and solid matching of the other letters but it has my "close" to the lines touchups which makes it look somewhat amateurish. If I was better I am sure I would cut out some vinyl to match the decal and airbrush the various areas but I don't have that kind of interest or investment.
So, I think I would have been much better off with the thicker waterslide paper. If you have any suggestions on this I'll hold off a bit to see if someone responds. I assume there is no clear filler that anyone can suggest. I really don't want to remove the decals and start over.