Has anybody tried Ghost Armor?
http://www.ghost-armor.com/Nokia/786.html
I had this on my iPhone 4 and it was great. No 'orange peel' effect, and had a nice, smooth feel to it. Just have to find it in your area. The kiosk where I had them do it and my daughters ipad didn't take very long. Will be getting it for my 900 next weekend.
I had this installed on my wife's NL900 Cyan. I had the full body one installed. I must say, that it's definitely not for my Black one as it takes away the matt finish of the device shell and has the gloss finish.
The screen look fine though. It does maintain the clear black resolution.
Hope this helps.