During a few rainy days during commissioning of Intuition this spring, I focused on examining the brass Sea Dog overhead dome lights on my 1990 Vintage PSC 31. What initially looked that sever corrosion, turned out to be nothing more than oxidation probably caused by oils on our hands. I found that the overhead dome lights could be taken completely apart, without disconnecting the wiring: remove the brass ring and glass light diffuser (3 small screws); then remove the light bulb (double bayonet non indexed ) ; now remove the nut holding the on/off switch to the base; then remove the screws from the fixture base (3). Turn the base around and notice there is one small stainless screw holding the bayonet mount to the base.?
The wires are now still attached to the bayonet bulb mount; but the base and trim ring can now be polished. I used one of my favorite polishing products: Colonel Brassy (??).