That is going to be the best obw ever!
That is fabulous fabric on its own as well as a obw. drool. I've been looking for my perfect obw fabric and haven't found it yet... I almost had one - but I had washed my material before I knew about them :'( There is one piece in my stash that would be perfect and more than enough material but it was prewashed already ... it's all good. I'll find one one of these days.
I can hardly wait to see how yours comes along!