For my gal Dana - this one's for you! ;)
When I was at Spark in Christy Tomlinson's class a lady commented the Sharpie Retractable pen works just as well on canvas covered in Mod Podge as the Pilot Permaball(which is now discontinued). I was surprised since I had tried a fine point Sharpie & it would not write on the canvas. It seemed to dry out.
So I bought a 2pk & gave it a go......WOW!! To my surprise it works BEAUTIFULLY!!! :) OHH!! This is going to be a new FAV! You can see on the canvas where I outlined the wings - that is the Sharpie Retractable. Just make sure it is the retractable pen. The traditional do not work. Need to work on this canvas more so pics to come soon.