Diamond Brite was applied July 2002. The contractor applied acid to expose the aggregate. We were sold on the idea that this product would be more smooth than plaster and would not stain. Our feet become raw from the rough surface(over exposed aggregate) and stains from flag stone copping exist in the beech entry. QUESTION- Can I sand/buff the pool surface to get the smooth feel I thought I was buying and what do I do about the stains? Obviously this product has its problems.