@MAUGHOLD
As I said in the first post, decals are repainted on the new round event, and client connect event. Unsaved or deleted decals are not repainted. I tested on CS 1.6, so perhaps DoD has a different new round event.
If you can make a bullet hole, spray paint, or grenade blast on the surface, then you can write on it. If not, then you cannot write on it.
@Dogg
You're welcome.
Nope, not possible. If you want special characters or text color, then you will need to use custom sprites. Clients will have to download the custom sprites. I prefer to have no downloads for clients.