This is from the Green Eagle Diecast vintage model back in the day. I had this in my old box of stuff for years. It looks like it was painted over. The doors and landing pads were painted. It can probably be stripped pretty easily.  I probably did it to match the show's all-white look. Who knows...
The part is in pretty good shape otherwise. 
This is a great piece to have that you can restore and maybe put it on the other ship if you're missing a part.