I bought some seeds this year, but have not tried yet. So I eagerly await your continued progress!
A few years ago I bought a book called Lithops- Treasures of the Veld, by Steven Hammer, published by the British Cactus and Succulent Society ( I know, I am a total Geek!). It is actually in a second edition, so I guess there are other Geeks out there too.
I just looked this up in the book- he actually does not even wait for them to germinate, he uncovers after the seeds have been planted 3-4 days which seems long enough for the seeds to swell and get going. Then he mists them, but not so they stay soggy. If growing under lights he recommends a fan. If outside he mists once or twice a day when he does this in summer, under a glass or plastic so if it rains they are not washed away.
He does water with fertilizer "a small amount", and cuts back on the misting in about three weeks.
He has found he can keep 50-150 seedlings in a 8x8x8 cm pot for a year. I have to remember this for if I ever have to live in a tiny apartment!
Photo?