I use flat diamond stones for most of my sharpening. They cut reasonably quickly and stay flat. No oil needed.

You have to remove metal to really re-sharpen. Hones re-shape the edge, but eventually you have to remove some metal. It takes a little practice to get accurate and consistent, but it isn't too hard. Always watch the point, it is easy to round off the point.

The various guided sharpeners make it much easier, but those are not cheap.

Does Randall have a shop specified sharpening angle? Does it vary by knife model. And, if anyone knows and can answer, please say whether you mean an inclusive angle (the angle formed by the two bevels) or an exclusive angle (the angle between the bevel and an imaginery center line).