Since reusing frames for many years, still tape the vellum in so it can be easily removed for next year. I use colored duct tape cut to size to attach the side seams of the frames on 2 sides only. The duct tape is cheap and easy to apply and repair. I only tape 2 out of the 3 seams so the frames can be laid flat for storage. They still stand up well and if you want, you can duct tape all 3 seams and remove 1 later for storage. I place paper towels between each unfolded lantern to protect the paint and then they are stackable. This year, I needed more frames and at Dollar Tree, found a bunch of framed gothic prints for $1 each. Got rid of the print and glass and had perfect frames without even painting them! (The frames were black and looked great with the grayscale vellem photos)