LOL !! Laughing so much I forgot what I was going to say !! Be right back ,,,,, !!
Well, since all the person asked for was information and opinions,, mine still is,, take it to another framer !! I realize PVA dries clear and is used for some things but it also takes water or moisture to remove it and with some items, depending on the type of paper can cause yellowing that I would not want on my map, antique or not !!
I am just taking for granted that the poster knows his own map !!