I have all this vellum that has been painted by my paternal grandmother, so, (trust me I have excess) I took some to play around with and this is it. What type of adhesive should I use to adhere this material, it is pretty thick. I want to say it may even be plastic, not vellum! Not really sure, it's really old. And, some of the paint is chipping, is there anything I can use to seal it? I want to use some of her designs on pages when I do this side of the family!