I don't know about fabric dyes, but I had an accident with my ASH-1 with some brown leather dye and just went ahead and dyed the whole side. I like the way it turned out.
Sounds like you've got some interesting Ideas, definately worth a shot IMHO, I can't wait to see how it turns out. <img src="/ubbthreads/images/graemlins/wink.gif" alt="" />