There is a lot of blue frockness coming out of the Kittyhaus lately. Finished this today (excuse the bumpy hemmage, I'm hoping that will improve if I press with a damp cloth. This dang bengaline fabric doesn't let go of its creases easily, so I recommend unfolding and rolling it up if you are storing it)
I found some braid that looks just like piping at Remnants Warehouse in Marrickville, but you sew it on flat. I wasn't confident about piping a curvy peterpan collar in super stretchy fabric, so I was happy to handsew the braid on the edges of the collar, and I machine sewed it on the belt.
I piped the armholes, well, it's really just the bias binding facing which I left poking out a bit, on purpose, but still! Matchy!