Sometimes 'googling' on the web will bring results ten light years from what you want. All depends on the choice of words you enter. Even on this forum and others, at times I know there is info sitting in cyber space on the forum but will bring up topics remote from what I want and/or state no posts found when typing into the search box.
Reference arbor lube, can't recall what grease I used back in the early days of cap n ball shooting, never an oil but sometime back in the early 90's I started using a red grease in a plunger tube marketed by a gun lube outfit that worked very well. My thoughts is it was some form of synthetic. I quit using it as I had to get it from an online outfit and I found that white lithium that I could buy locally worked just as well. I slather up the arbor and spin the cylinder on to distribute, might have to wipe off a bit of excess. Will smear a bit on the ratchets also for a harmonious outcome. No matter how many shots I make on a revolver with white lithium, the grease will still be the sort of off white it was when I put it on except for maybe a 1/8" or less at the forward portion that would be brownish from firing. Recently a friend gave me a container of Mobil synthetic that I've always been going to try. I did shoot around 60 shots with it not long ago using my ROA and had no problem with it.
FWIW when cleaning and replacing the nipples I put a small dab of 'ant-seize' on the nipple threads. Have never had a nipple hard to remove. White Lithium works very very well. I've read that some contend the reason they lube over the ball is so as when firing, the grease that is sprayed everywhere and on everything is what lubes the arbor and other needed friction areas. Biggest male cow dung theory in the world. That grease that is sprayed out from the front of the cylinders has about as much chance of entering fully into the arbor/cylinder area other than the front as I have trying to orbit a bottle rocket around the moon. I would hope those that contend this practice and idea would grease the arbor when they do a teardown. Oh well.