Yes, these are your trade secrets for the what... but there's a part of your process which is both why it's so cool to share technique, and not a problem that you do share technique.

The whole '...I just see in my head...' thing. That's the part no one else can replicate. Oh, they'll be able to see in their own heads, but that's also why the work will be theirs.

Very nice tutorial. I was shopping for masques this past weekend at a local medieval faire. Didn't see anything to match your work, though.

BTW, followed your link from Deviant Art.