Hi everyone and thanks for the nice comments. Here's answers for all the questions.
The under playfield assembly were zinc plated as the original process. Painted the surface, new light sockets, new GI power wire and etc ... everything that is possible is done.
I made the the touch up for the top of the playfield, i devellop lot of skill and precison with this process. I restore playfield from this era for almost 10 years now. I can say that i painted 95% of the surface. The artwork is not very detailled and it's not a problem, just lot of time.
The surface is shinny because of the clearcoat.
The gameplay is very fast and challenging, i'm in love with it