I'm wondering how the amber paint will turn out. Remember, that may be an accurate color for the actual domes, but, when lit from within, they'd appear much lighter. I've used clear orange on mine to simulate the lighting effects. I suppose it depends on whether or not you're depicting a powered-down ship.
As for the Bridge, I apply a glob of liquid latex masking fluid, then carefully rotate and tilt the saucer around, letting gravity move the fluid toward the edge of the dome. Then a bit of cleanup with a damp brush or toothpick around the edge. Usually works well.