I haven't hear of this.. doesn't mean it don't happen... but it seems there would be an easily found 100 page long thread extolling the virtues of this technique.
I reckon some 2nd & 3rd cutting bud would look & smell remarkably like Alfalfa, and nobody with a grade 10 or above would want it.
Are you thinking of re-vegging a harvest plant??? A slow process that amounts to keeping it on life support, and possibly slower than starting a new one from seed?? People do that often enough.
Another possibility, and I might be trying this.... Harvesting the older mature buds, then leaving the newer less mature buds on for a while till the trichs are ready. Of course, I might harvest the mature stuff and hammer the less mature small stuff on bottom branches with a GA3 foliar spray to induce hermies, and feminized seed.