It looks great! I think I would try to avoid stitching through the fabric paint as much as possible. If it's a hard type, it could break the needle. If it's gummy, it will get the needle sticky and cause quilting problems. The photo transfers I would do as little quilting on them as possible. I think I'd do whatever all over pattern you wanted to do on the whole quilt but leave the "problem" blocks unquilted. I would then FMQ quilt the blocks individually on a regular machine. Good luck!