okay my Fiance's ex wife put a bunch of plaster on our bathroom wall and did a HORRIBLE job at it and i have it on the baseboards where she didn't wipe it off and everything. I think she was trying to make the walls wavy or something... How can I get this off my walls to re do them? The only ways I know are to completely re do the sheet rock or take a sander and completely sand the walls even if that's possible. I tried scraping it off with a putty knife and only ended up with a hole in my wall. Any advice on anything else I can do to get it off??