the best way to do the logo fabric for the coach bags (also for LV, fendi, D&B etc) is to make your own stencils. I use airbrush stencil paper and cut out a set of 4 c's for the coach (print the c off the size you want.... the coach font is "Engravers MT". Then just tape it on and either airbrush and use a sponge and petal dust with everclear to paint the color on. do all the patterns in one direction, was the stencil flip it and do the opposite direction.
Hope that helps!