Any game that is played 16 hrs a day, seven days a week is going to get wear sooner or later.
Having said that, I have never seen a Stern machine at TimeZone Surfers with any Playfield wear even though some have been there for 2 or more years getting tortured daily.
That is a real life testament to Sterns quality playfields.
And these games are the most tortured on earth.
They probably change the factory settings to make multiball harder to get so you play shorter games and spend more money as well as perhaps saving some playfield wear ?
The games at TimeZone show that any game purchased for home use will never wear out.
If the commercially used games at Timezone don't show wear after years of torture, the belief that Sterns clearcoat isn't thick enough is a myth to me.
Timezone Surfers with over 6 years of Stern games sited with no wear on any of the ones I have seen and played is proof enough for me. Will have to see how the KISS machines hold up. If all the others are wear free, Kiss shld be just as durable.