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Tuesday 19 December 2017 at 22:13
Quoted from TheLaw:get the novus 2 out for that
Or try rubbing with your finger first. That often works for me just to get the dark lane lines out.
Source: http://pinside.com/pinball/forum/topic/cleaning-and-waxing-pinball-machines-vids-guide/page/24#post-4131809