Used 1/4" plywood, sanded just a bit, (I like seeing the texture of the wood) they measure 26" x 26", real barn quilts are huge.
We taped off the size we liked on the fence before deciding, you will be surprised
how big it will need to be.
I'm using acrylic paints, a black paint marker to outline, (which no one will ever see)
and I did 3-4 coats of poly, on top, back and sides
No straight on photo, huge tree in the way !
Beth is the Author of The Quilt Ladies Book Collection
and Little Quilt Ladies Pattern Series