Gandy,
I just took a look at mine. The threaded lamp socket is brass. The drawbar pin was more problematic. I covered mine with shrink tubing to hold on a drawbar I made out of sheet metal so the engine could pull PW tenders. I lifted the bottom of the drawbar up and the bottom of the pin was brass. Most of the rest of the pin is covered in the shrink tubing, but my guess is....it's all brass and not painted. There is the possibility that my drawbar could have removed the black paint if it was indeed painted. As I don't want to remove the shrink tubing, we'll need a verification from another member.
Roger