I've created a Marine Chapter called the Silver Lancers that is reliant on stealth to achieve its objectives using a lot of infiltrating units. The chapter badge is a silver crescent moon. The problem is, while this looks good on shoulder pads, it looks pretty bland on vehicles. As I'm only going to have two whirlwinds in my entire army (even at 2000 points) I want them to have a really cool looking decorations that show the idea of the chapter.

My current thought is to hae a full moon with some clouds across it and the image of a panther ghosted in front of it. This would be done in plastcard or a like material. I'd appreciate any comments or suggestions as to what I can add, what I should take off, or how to go about modelling it. Thanks