Super happy with design, disappointed with back layer

I would have given these a 5-star review, but I had 3 in the batch of 10 that were damaged in transit (pieces of the backing had scratched off prior to unbox). The nearest I can figure is the white layer over everything on the back is very thin and easily nicked. I was planning on selling these with some of my author swag, but 3 will have to be scrapped from that plan. Love the product, but the white layer needs to be thicker.