2 years ago ,We built 18000 gallon Guinite/ plaster pool . Used diamond bright plaster- French Grey- plaster guy did a poor job , looks like clouds on the bottom , uneven color , Plaster guy said bring ph way down and brush for 2 weeks , we did and it didnt work ....We saw some improvement but not enough . Like to know about polishing . diamond bright has small specs of aggregate looks nice when finished ..... Any help appreciated