I mentioned in the post above that I also had an Eclipse scribing block. This was a gift from a friend when he was moving and I was very grateful for it. I am a little ashamed to say that aside from using it a few times with my indicator I have done very little with it.
Having discovered the WD40/Ultrasonic Cleaning method I decided to see if it was a fluke or whether it really needed the soak in vinegar first.
Because it was a test I took a few more before and after photos
I put all the smaller parts in the pot of WD40 and ran it through the US cleaner for half an hour. When they came out the dirt was loose, but they were not as clean as the items that had been pre-soaked in vinegar.
On the bright side, I gave them a rub over with ScotchBrite and the dirt came away easily with almost no effort. A second run through the US cleaner had them like new.
I did the main column with WD 40 and ScotchBrite which did take a bit of effort.