Our House has metal framed doors throughout the interior of the house (and a couple wood frames in our Home Office). I've seen this same type of metal door in the middle east as well. The metal is painted a glossy forest green, we suppose that the previous owner chose green because it goes with the green metal window frames. But the dark green around the doors is ugly and since the doors and frames aren't always perfect and the paint job isn't perfect, the green stands out like a sore thumb. So we plan to re-paint the frames a neutral and somewhat light grey color.
Right now we are thinking about going with Venus 1406 a pre-mixed Nippon 9000 Gloss Finish color which is 102 RM for 5 liters which works on both metal and wood. The one room this won't look that good with is the Guest Bedroom, pictured above which is a medium grey color. Although I think the light grey trim will look good with the white walls throughout the rest of the house as well as the dark brown in our Master Bedroom. As the green is really getting annoying, we can at least paint the doors of the rooms that the walls have already been painted and finish the rest once the walls are all complete.