3M quartz vs Gemstone 100% quartz ???
My pool builder originally quoted 3M and is now suggesting a product by Gemstone called 100% natural quartz. The plaster company subd for the job is poolscape unlimited in San Diego. They are claiming this product is 100% quartz versus around 53% for 3M quartz plaster. Does anyone have experience with this product and how does the sterling grey compare to 3M French Grey?