I dropped my signal parts off and asked about the threads being powder-coated. He said it's nothing to worry about if your threads are are fairly wide. It may offer a bit of resistance but not much when you thread it back in.
I finally got around to ordering my pole and base from Alloy Castings out in MA. I had them paint it but the color was nothing close to matching my Crouse-Hinds 4-way color which I plan on using it with. Their safety yellow was more of an orange hue much like the signals in the Toronto area.

Also I was not impressed with the quality as some paint was already nicked off and when I ran my finger along it, it easily came off. Not sure what was up with that. I should have left it unpainted. So now it's being stripped & powder-coated. Also getting the Crouse-Hinds slip fitter bottom piece (reproduction cast iron piece) powder coated along with a Crouse-Hinds finial and the top dome of the 4-way along with some crown nuts. The price: $90.

I should have it in within a week to ten days. I'll post pics when all is done and put back together.
Steve, you'll be impressed with the results.