Here's part of a quilt I made for the Girl Scouts' 100th anniversary. I had troops donate blocks to be included. There are a couple I'm concerned about quilting and would like some advise on. There are a few that were done with iron-on transfers and a couple done with fabric paint. One of the fabric painted ones is also on some kind of polyester, not cotton. I was planning to do an all over quilting pattern on my mid-arm and frame. Do you see any problems with quilting through these squares, or should I avoid them somehow?