Back and forth, Livi-style, circling motions, ... It does not matter. These are all directed to speeding up the process. Just try to be consistent along the entire edge and make sure all parts receive equal attention. Also the parts that are already keen.
It's sounds to me that you have a pretty fast Coticule.:tu
There's one general rule in bevel formation: the more you approach completion, the slower the process will appear. That's because you can't complete the bevel on the dull parts without removing steel from the keen parts. (Otherwise you would be reintroducing the frown or some other edge deviation).
As soon as the very last part of the edge starts to show a promising evolution, it's time to remove the tape an start doing regular X-strokes. Do plenty, because you still need to correct the slight off-angle caused by the tape.
The razor should also shave dry arm hair at that point.
Kind regards,
Bart.