hmm, I don't know. It gets super windy where I sell and thats why I needed it to be flat. That's why I dont even use necklace busts anymore- they get blown right off into this gutter nearby.
I am going to use a slim white velcro on a side wall not the top.I thought I would make a square with it on my earring mat and the wall. I'll put the soft side on the wall. And it's clear drying glue.
I don't know what would get ruined?
Oh and I made the mats without the velcro so far and they look great! I used a pretty cotton fabric instead of felt and a roll of plastic (for laminate) cut into pockets.