I haven't been getting alerts for some reason, and I forgot to check back manually. Sorry for the late response.
That technique gets used again a couple of times for healing, and once when befriending Hotaru to show her Ki. He says she can touch it as it's made of peace and love. It wasn't used more than a handful of times, and I think I mentioned them all. I haven't read that fic in its entirety since shortly after the last chapter was published.