Hubby is making one of our sons a coat of arms. He cut out a board in the shape of a shield but wants to attach green felt onto the board as a background plus put it on the back of board so that it won't scratch a wall. Have any of you had experience with gluing felt onto a board? Any special glue or will Elmer's white glue be best. Want it to be permanent and not come off. Don't want glue to soak through either. Will show a picture when it gets finished. Thanks for any help you can offer.