Just read the threads then.

Did either of you lightly sand the playfield before the first application?

I've done two playfields with KBS now and found it to be a fairly easy way to go.
Sanded first with 1200 WET
My only warning is be careful if you have put any decals on playfield inserts, it gets under them somehow and also dulls the printing on them. However I found that it had no problem with acrylic paint repairs.
Good luck