I had seven years of calcium build up on the tile, rust spots on the 3M quartz plaster, and dirt stains I did not think would ever be clean again on my 45,000 gallon pool. Bullfrog told me they would work hard to get it looking better. They did not promise that everything would come clean, but that they would do their best. My husband is a clean freak and a perfectionist. He looked at it when the work was complete and declared, \""It looks brand new.\"" The owner came out every day to check on the progress, and to make sure I was happy. He called me two different times to ensure my satisfaction, and made recommendations on how we could keep our neglected pool looking its best going forward. They were complete professionals throughout the whole process and seemed to personally care about my pool and my satisfaction. I would highly recommend them.