I have used anti-static spray made for paper products for years in an ESD production environment. It works well but note that I do not know if it is archival safe nor have I ever used it around stamps or covers. It never damaged or reacted to the paper items or other surfaces we used it on. I know one of the main ingredients is ethanol but they do not list other ingredients (even on the material safety sheet). https://www.amazon.com/Martin-Yale-...31739&sr=8-3
If you do experiment with this product, please use caution. I would try spraying just a single page, allow it to dry thoroughly, and then dry only common stamps as a test. I would be highly suspect if the dried stamps looked or smelled differently.