A little birdie who used to be a punk rocker told me if it’s not glossy paper and you add a little splash of wheat paste over and it dries, will be much harder to remove later.

I’ve also heard that if you have an image that translates well to a stencil old drumheads (basically thick Mylar) make a great material for stencils.

Based peeps should read Steal This Book and other lefty sources (Just for informational purposes only of course) to see techniques the left uses.

And in all serious, I can’t stand graffiti (approved murals are different) but I would guess most pedes would not just throw things up Willy nilly on privately owned buildings etc.