I have a BKSOR Premium on route now for about 6 months. I haven't checked the audits lately but I'm guessing it has somewhere near 4,000 plays on it. The upper playfield is getting fairly cloudy. I've removed it and cleaned it as best as I can, but it's definitely not crystal clear. Other than the WAR rollovers really not much you need to see under there anyways.
Question is, has anyone tried flame polishing the upper playfield? I have a new one to install eventually, but wanted to know if that playfield can be flame polished at all to keep it looking clear for a while.