I just found wet canvas, and being a fan and doer of western motif art, found your project very interesting.
Never tried a mural, it seems overwhelming to me - and managing perspectives, etc. at that scale would be mind-boggling. Don't know how it's done, but I think I would do something small and project it. On second thought I wouldn't even do it.
I do cards for a western card company called "Leanin' Tree" - been doing them for over 20 years... western humor stuff. Just a little sample here (hope I'm not being a jerk for posting an image in this thread of yours, if so, apologies)
They are also putting the art on cups, shirts, etc. I also have done realistic western paintings, and am going to start doing those digitally as well (been doing the illustration/cards digitally for years). More at http://www.nateowens.com
Anyhow, love your murals and the whole package!