ACK!  Guache is evil...I remember night after 
night of start overs in art school over that 
nasty stuff.  But, if you know how to use it, 
it's very very nice.  Most anime bgs I've seen 
lately I think are done with guache.  It looks 
nice too, the one you did!  I have done a few 
myself, but only with CG paint programs....what 
can I say, I have fallen into the Gap. Nice job!  
Pretty pretty cel!