That's an interesting perspective I've never considered. The non-aircraft non-armor modeler looking for unique items of their interest. I bet it can be difficult finding genre specific supplies sometimes like maritime colors. Actually, now that I think about it, there used to be a great small hobby shop north of Dallas that had a rich bounty of planes, trains, and tanks but I never saw ships, space vehicles, model guns, etc...
My guy at the hobby shop said if I wanted a good equivalent to the MM paints that I should try Vallejo Model Air paints. Unfortunately, they don't sell them at this time.