Amazing, will look at the resto progress of this one.  

Not saying this is the case here, but I purchased decals from Wayne a couple of years ago for my ToM and where I position my fingers near the flipper buttons have worn the print away very quickly. Unsure the method you used but mine are definitley inkjet style. So it may be advantageous to maybe install cabinet protectors around the flippers to avoid this for your customer. I think I've seen clear ones like you put around pop bumpers???