If it is on the fusible batting and comes off easily I'd treat the whole thing like a design wall and remove the pieces and sew them together. You could use some chain sewing. Quilt in a Day uses this method off a design wall in a lot of the quilts. If it's the thin grid, that would be like pressing the pieces to an interfacing type product I'd fold them over like the you-tube demo (which was a little light on demonstrating). Do enjoy the journey.