Hello Mate
Have booked onto a course with Goldtrowel this month, costs around £390 inc VAT, done quite abit of research on it and beleive it will be the next big thing in the UK, not many people are aware of it here but it has exploded in the US, its mainly used in bathrooms and kitchens but you can have it anywhere really. If you google Venetian Plaster you can get lots of examples of it, its stunning to look at and does cost alot but I think thats down to there not being many people doing it, hope that helps.
Johnathon