Maybe a bit over kill but if one had access to a vacuum baggin setup, I have done thus very thing by applying a very thin coat of epoxy laminating resin to one side, put the two together with tape on each corner, place on a flat non porous surpace, outline with sealant tape and place bagging film with vacuum port over the part and pull vacuum. Sounds like a lot of work but in reality would go quickly. Once you have a vacuum system, you find many uses for it.