Not trying to be critical or anything as this machine is spectacular and I would love to have the money to buy it. The only thing that I noticed that looks like it needs to be touched up a bit is the outer ring of the coin door. Maybe it is the lighting but it looks to be worn a bit up top.
Good luck with the sale. Maybe somebody in Texas or LA. Will buy it so I can play it some day.
That 'effect' is actually part of the artwork. It's on mine as well. Here's the pic of the coin door from IPDB: