I don't think the dimple method is the best way to go on spoke wheels, but I'd be all over a bit of metal tape or folded beer can aluminum.
As long as the bearing doesn't bounce around in the case, it shouldn't matter, since it will spin on the bearing surface way before it spins within the case. If it spins within the case, the bearing would be bad, real bad, damn bad.
Then there's JB weld, a light coat around the bearing. It's one of the original uses for the stuff. Cleans right out too, with a wire brush attachment in your drill. :drinkup: