i have been (well i stopped for a while, other things to do), but i have been adding quilter's fabric blocks to my foam walls. i know i am using thin fabric vs paper. one thing i did notice, the fabric soaked material does not stay as well on the wall. so i started to paint the wall first with the poly, then painted/soaked the fabric and added it to the wall. worked better.
so you might want to coat the poly first on the foam then the paper and add it. as far as dry time, i don't think you really have to wait long, i never did. this poly stuff seemed to dry very quickly.
this is just my opinion, but i think soaking the paper like gpw mentioned, is a possibility, but i don't think its needed and it might just use up more poly that way.
this is a work in progress, it is not done yet.
