We are preparing our home to sell it. We live in So. California where basements are rare, but we actually have a 650 sf basement. Years ago, before we had proper gutters and professional landscaping (including grading) and underground drains installed, our basement flooded a number of times but it has been completely dry now for 5 years (since fixing the outside problems). The lower portions of the blocks do have so white residue on them but look to be in good condition. We are wondering what is the best way to make these walls look their best. We thought about brushing off the white area, sealing all walls with a concrete block sealer...beyond that, we have no idea what to do. We don't think the walls would look good painted because of the uneveness of the bricks that have been exposed to water. We are recarpeting the basement and putting a new ceiling in - so we need to keep expenses down. Any suggestions would be much appreciated.