Yes.
A snapshot of my custom-painted (by someone else) Williams done many years ago, and weathered by me not too far back. Needless to say the 3rd Rail versions would be better (and more pricey). There are many flaws on the Williams, as a model, out of the box.
I have an ABA set of brass R-O-W PA's that I plan to paint and detail for the GM&O (not the PB - they didn't have any), but a nice GM&O PA would save me the "trouble".