First of all your ship looks fantastic! the only experience i have on this vehicle is that ive painted the bandai 1/72 scale, it does come in molded color and could be built and left unpainted however i painted mine in satin black for the main hull, matt finish would be way off in my opinion the wing panels i painted a very light shade of grey, a custom mix of humbrol white and a dark grey added as for the red i'd go with any blood red with a black wash on it's recesses/ nooks and cranny's, you may not want to go the humbrol route they come in very small tins for brushing and air brushing, it would take a whole day to airbrush your beast.
Let me know if it's ok to post a picture of mine here, if you'd like, it may give you some ideas