that's a shame Nino but not surprising.

I saw pictures when the last Chicago Expo was on of Cicago gaming doing the playfields and they are doing the MMR playfields as well.

http://aussiepinball.com/index.php?topic=14221.0

Since this story unfolded, I've checked over 20 Sterns and the problem is definitely a combination of poor product and / or poor application. Facts are that every single Stern playfield (in fact all DMD manufacturers) have some degree of dimpling. Stern themselves have no real issue with this, and confirm that dimpling will always happen on a played machine.

My KISS LE - has maybe a dozen dimples - but is still like a sheet of glass.
KISS PRO that was used in a comp - same
TWD PRO that was picked up yesterday - same

We are going to approach Stern one last time to see if they are still interested. At least we tried !