Very pretty, they may not show up as well as they would on a different background but at least they'll last longer. You could always cut them apart leaving an edge and put sashing around them and make another quilt or wall hanging or even maybe another row of a light colored lace around the existing quilt pieces. No matter what, be glad that with it now mounted it will last so much longer and now can be enjoyed instead of packed away. Memories from the past should always be around to be enjoyed when we can.