We have removed old tile from our bathroom walls and have found either old thinset or old adhesive stuck to the walls. I have tried Goo Gone and it doesn't touch it. I have tried a sc****r but am not getting it all off. Any ideas about how to remove this from the walls? It must be on the walls about 40 years and it is a plaster wall that it is stuck to.
Thanks for any assistance.
wwinger