I have found that regardless of their advertising device screens scratch. Also, when i drop a device (as I do semi-often) the case is usually damaged. So. One of the first things I do after buying a new electronic device is cover it with protective plastic. A custom designed bullet proof body condom would be great but they're almost never available and if they are the price is prohibitive.
I found a product called "invisi-shield" a few years back. The clear plastic is quite indestructible. The company selling this product changed over time now calling themselves Zagg I believe. I purchased a kit for a cell phone 2 or 3 years ago and it worked great. The plastic protects the screen and the extra pieces seem to work well on the edges of the device. Not perfect protection from drops but quite good. I even had an extra piece which i installed on my son's point n shoot before his first tour to Afghanistan. Son and camera home unharmed each time thank God.
So I purchased the largest piece they had available, fit for a laptop computer and I cut pieces from it with a very sharp pair of scissors. Knifes (or razors) don't seem to trim this substance.
I had to return my DP1 because of dust. I peeled the plastic off and re used it on the replacement camera. The sticky stuff still works pretty well but it doesn't look as good the second time around. In a way though this is actually better. When folks first see my camera they often think it's held together with scotch tape. I'm imagining it's less attractive and less likely to go home in someone else's pocket that way.
One thing I learned from a previous camera is that a mono-pod scratches. I put a piece of plastic over the tripod screw hole (difficult to cut properly) and there are no scratches. I also cover ends and corners against the inevitable drops. As I had a dust problem I have also begun to cover seams. Who knows if it will help or not.