Something a bit more recent may be of use such as this think it runs to 27 pages.
Backgear is used on the older machines as a way of getting a slower speed so just use your slowest available speed.
As for the skin, well the surface of an iron casting can be a bit harder than the core so taking light cuts will wear the tool that is why its suggested to take a reasonably deep cut first BUT Stuart castings of late don't have much machining allowance and if your lathe has low power and/or a highish low speed then this won't work. Ideally you want to take at least 1mm or 0.040" cut as your first one if possible.