Hoping someone can help. Just had two bedrooms built in my basement. Outside of the rooms there is an area about 16 square feet. The contractor was not careful and plaster stained the painted basement floor in this area. One of the builder's employees scrubbed on it for a long time with Krud Krutter, Easy Bam etc..., but there are still essentially flat stains all over this area. Is there some kind of solvent or cleaner that will allow me to remove these stains? Thanks.
RL