It looks good for a first skin, It really suits the car. It's simple and looks good. My only problem is the Decals on the hood don't really appeal to me, They ruin the rest of the skin.
Are you high again? Re-read pls I'd personally remove the decal on the hood. The style fits this car though
The skin looks great, although I'm not a huge fan of the graphic on the hood. The graphic on the side reminds me of the graphics common on cars in the 90's, I always liked those.
You open the [vehiclename].c.dds, so for example, for the moonhawk, edit moonhawk.c.dds Make sure to save a backup of the file.
you can open .dds with paint.net also heres a tutorial http://www.beamng.com/threads/2796-Tutorial-How-to-skin-your-own-vehicle?highlight=skin
Here's my version without the hood decal. Note to Op : If you would like me to take it down I will at your request.