I display 17x25 dry mounted on acid free foam core at 24"x32", Premier Art Print Shield spray, and no glass. The mounting is done by a local framing shop, I supply the foamboard. I've tried both spray, as well as a 3m adhesive film, which is finicky and ok up to a framed size of 16x24, but I've never been able to get decent results DIY on the larger sizes.