I have an A4 sheet of paper inside of a standard (plastic) protective foil/lamination. I would like to affix this sheet onto an external wall, as a public sign/notice. The surface of the wall is not smooth but rather a bit uneven/textured.
I am wondering what kind of substance to use to make the foil stick to the wall. I guess some type of playdough should do the trick, either the type for children, or maybe some special type used in constructions. But I am not sure which type to buy.
I would like this to adhere well between the plastic foil and the wall, but also be undoable, for when I will want to later remove the notice; but for it to withstand weather elements (rain etc).