I've finished electrical and mechanical repairs on my Spy Hunter and started cleaning the playfield. I noticed in all three of my pinball playfields, this cracking action. I figure it must be wood grain? Is it acceptable if you don't feel it or is there a way to lessen its visual impact? The shiny image is before I used Novus 2. The matte image is after Novus 2, black touch up and before wax. Thanks, Darren