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Thursday 26 April 2018 at 11:54
I’ve looked at all my machines and see dimpling and scratches on all of the play fields. The older routed machines are smooth in high traffic areas, which supports that they have been pounded smooth by 1000s of plays. Newer machines with newer clear, darker art, and brighter lighting highlight dim...
Source: http://pinside.com/pinball/forum/topic/steve-ritchie-discusses-pinball-playfield-dimpling/page/11#post-4362645