Posting a question from my dad...
He's removed a strip of thin tiles which were stuck along the bath edge horizontally, butting up against the wall, and wants to replace them after re-sealing the gap between the bath and the wall. It would be a better job if he could get the old tile cement off the bath enamel (it's an enamelled cast iron bath). Any ideas how to do it, preferably without wrecking the enamel?