My sister just moved into a very old home and the fireplace is not useable but very much the centre of attention in her living room. The fireplace and hearth are very stained with what looks like a very oily substance. We have tried to clean up all the brick and the opening with moratic acid and it has not helped we have decided to paint the brick white to be the same color as the room. Is there a specific type of paint to use to paint this 40 year old brick? I don't think the fireplace will ever be used as a fire burning fireplace again as it is very inefficent. What type of paint should be used and how long will it last?