If orf is recurring on your farm, Scabivax works well. Vaccinate the lambs each year, the ewes don't need boosters ime.
The big advantage of using salt and sulphur is that it not only facilitates healing but it destroys the spores that carry the infection on from year to year.
Oh yes, try the natural preventatives first, of course. But if orf is still occuring for whatever reason, then Scabivax works well. You have to do the lot, though, as once you've vaccinated any, the live virus is now on the farm again... :/
(We had eradicated it, then found that our neighbour was vaccinating, so ours started getting it again... :/ Hey ho.)
Actually, as far as i know this is the 1st time I've had orf and I've had sheep here 10yrs. The only movement on in the last 12 months was a cow & calf, but the vet thought it unlikely they would've brought in the orf. So i don't know why it's started.
I guess i like the idea of a preventative lick - either diy of the frobut or both.

Unless it's always been lurking - it's been a bit of a poor year for lambs for me (18 when I've never had less than 26 before) and maybe they're just succumbing to things this year. [size=78%]There have been lifeline lamb and ewe buckets, yellow rockies and a himalayan salt lick over the winter - although the himalayan ran out about a month ago and the lifeline l&e about 2 weeks ago, so i doubt it's mineral issues.[/size]