Hi Steve and Chaplin,
Yes Roger Smiths video is great. The link is below.
There are a few products out there that work well that can be purchased from watch material houses. “Evap-O-Rust” (I use often), “TechCorro (haven’t tried it yet but hearing some good stuff about this one) etc. Also Naval Jelly works very well and can be purchased from hardware stores. Something that works pretty well is regular Coca-Cola. Don’t want to leave steel hands or parts in too long though. You can find out more about Coke by putting “Coca-Cola as a rust remover” in Google search.
Here’s the link to the video.