I bought a package of Giffin universal screen care, cut to fit the display area for mine. I think i got it at Wal mart. I have enough for several but i have only used one since July. I have not had any dust in the display area or scratches. The reason i bought the 800 was to listen to digital systems and not analog. I did a lot of research as to which to buy the Uniden HP or the 800. For me it was the wanting a scanner to carry to and put in my pocket like a traditional scanner and the better digital conversion as I tried a friends HP and for me the 800 was the better choice. Do your own research and make sure you buy the right scanner for you as they are expensive and you have to be happy with it.
I did the same. The screens on the PSR-800 scratch when you look at them the wrong way (more like scuffing). I put a screen protector on after just a few days and am glad I did. Just get any pack of screen protectors and cut them to size. This is one of the first things a new 800 owner will need to do, along with picking up a few sets of powerex 2700 or duracell 2650 batteries, since it's a battery hog. One other think I recommend that new users do is ditch the stubby antenna and at least get a standard GRE / RS scanner antenna, if not a RS / GRE 800 antenna, or the dual band antenna of your choice. The stock stubby unit doesn't do that well, but is cheap to replace. I could add to the list getting a 4GB or larger class 10 ultra high speed card, but I'll stop there.
As a scanner user of nearly 40 years now, having owned all the great ones, this radio stands alone in my book. After a while you get quite used to the four way button in concert with the menu buttons, and you can get anywhere you want over hundreds of scanlists quicker than you migh suspect before getting used to the unit. Great audio, great display (you will need to use your backlight), great modern design. No problem with paint or letters wearing and it's with me every day. I truly love it.