I think thats a great idea! If anyone has tried that I'd like to know how they dealt with the metal nubs sticking out of both ends...
I did it with mine, All I did was file down the nubs so they were barely 0.5mm showing, Put a tiny amount of super glue around the base of each nub to make sure they were secure.
Wait for that to dry and then cover it in Di-Noc and make sure you really work the Di-Noc into every nook and cranny with your finger nails.
I don't have a camera at the moment So I can't show you mine but this is an example of what the end result should roughly look like, Although I would call this a very rushed job so if you take your time you should have a perfectly flat surface unlike this gent who didn't take the time flatten the surface and make it look neat.
Edit:
Oh hey Liquid here's what I did with my SLI fingers, This was before I went SLI though but the principle is exactly the same, It looks a little wonky on the lower right side but that's the shadow from the flash.
I got an old SLI bridge, Cut it into 2 pieces *Obviously don't do that part when going SLI ^_^ * removed the little nubs and then super glued them to a piece of black plastic card, Smoothed and cleaned the edges and then put Di-Noc on top.
It just slips right on and makes bare SLI fingers look a whole lot tidier.
You don't need to use Di-Noc but it's a good option as it makes anything look clean