Had a big site on a while back had to knock out the houses quick ,we was scraping all the linings but then had the decorators moaning that we was fooking them up by chipping them and they had to fill them ( they were cheap shite linings anyway) now common sense kicked in we put duct tape around them and pull it off when it's done .1 min to put it on and Seconds to pull it off ...clean lining ...rather than 5 mins of scraping and getting moaned out .