Hello,
I think this is the same reply as cehall's but I'll explain anyway.
Create a datum plane tangential to the direction you want the text to be at e.g. If you are modelling a clock and you want the figures on the outside of the clock, starting with one, draw a datum curve at 30 degrees to the vertical on the edge where 1 o clock will be. This is your sketching plane. Choose another plane for the orientation. Sketch the text as normal, giving it a double sided blind depth, exnsure the depth is sufficient so there are no gaps.
When you have completed all the text features, you will need to do a revolved cut leaving the text at a height you require.
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Hope this helps.
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maybe only a drafter
but the best user at this company!