That is REALLY cool!
I tried a canvas (painted) that I "removed" from the stretcher and tried to make it into a bag,
but the gesso gave me some problems.....
I LOVE yours.............. .....
Did you hand sew it?
I did not hand sew it. I did the sewing on my machine. I did use a thick needle, that said it was for Denim, and used thick thread to sew it with. I think the black velvet may have some advantages to a traditional painting because it is not primed with gesso. I can imagine that the gesso might cause some issues, as there were a few points when sewing it, where the paint was really thick and the fabric folded over, that I was a bit afraid for the motor of my sewing machine. But it worked out okay.
One nice thing about sewing the painting was that because it was pretty stiff and the velvet wanted to stick to itself, that it did not need to be pinned very much. Another technical note is that I managed to put the bag together with out ironing the painting. I am not a hundred percent sure, but I think the acrylic paints would not have held up well to ironing.
(And I didn't want to crush the velvet.) Luckily the painting just kind of folded into place.