well so far it's looking pretty good, I would be careful of the extra geometry on the side window, right now it's pretty close together (near the middle) which might create a slight bump when you render.
and as for the "painting" part, I usually wait until i get the mesh completed before i move into the texturing and materials part.
because everything is a solid mesh I would look into multi-channel texturing i guess... I am not too familiar with max anymore it's been a few years since i forced myself to do anything in it.
just do some searches for "3ds max shaders" or "how to make glass in 3ds max" just use your favorite search engine
so far it's looking pretty good, keep it up, and keep posting updates
