Edie,
I’ve never tried acrylic gloss medium. Does it bond well to foam board? Is it heat activated? I may have to get some and play around with it. The art is not three dimensional so I’m comfortable plunking it into the dry mount press. I’m just having difficulty spreading the fabric adhesive uniformly onto the back of the canvas.
As far as the patch is concerned. It is a very heavy woven, embroidered material usually sewn onto cops’ uniforms. It isn’t irreplaceable; they’ve given me three to play with. Even though they are only 4” x 6”, none of them are lying flat. Sewing one into the mat board, for me, would be risky, because it would require quite a few stitches to keep it flat, and it is part of a 41 double opening mat. If I screw up and misplace a needle hole, I am sunk. (I don’t have a CMC, unfortunately).