I have just done the black flocking material for the inside of a 60a2000. Although the Sony has a darker gray plastic than some other TVs, I felt it would be worth it to do it anyway. Edmund is not the only place to find the adhesive-backed paper. In fact, I have lined telescopes with such material and there are two places that offer blacker material --McMaster-Carr in LA and Protostar, a telescope company. Both are on the internet with a search.
The screen and bezel must be removed. To do this remove all the screws around the back of the bezel. Leave one or two screws in at the top so the screen won't fall forward unexpectedly. You must also remove the back bottom panel (9 screws, remove the little side door first). Once removed you will see on the left and right facing the back 4 more screws holding the bezel on from behind. Remove them. Now you must remove the small panel that covers the front center controls. Gently pop this out with a flat screwdriver from both sides. You will see 3 more screws. Remove them. The whole front screen will come off when the top two screws you left in are removed. The bottom of the bezel has alignment tabs when you put in back on.
Cut the flocking material to size for the inside of the panel and apply it. Don't get any in the way of the light beam from the projector. Since this happened to me 5 times and it is immediately apparent when the material has fallen down in the picture, I would suggest using spray adhesive also applied to the back of the material to insure it will not slip, but only for the back aned sides. Since some heat is generated within the box this will insure it sticking, and staying in place.
The result is a blacker screen even when off and more contrast, although there is no way I know to measure this.
As for warranty issues, I do not know. It probably could be removed on that occurrence. Some calibration services offer this as an upgrade.
I also got a professional calibration. Having lived with true colors for two weeks now, I would highly suggest this despite the cost. Perhaps those who are good techs can do it themselves with the proper equipment, but I would not venture that far, considering the incredibly vast service menu.