14 December 2016
We have black quartz worktops with sparkly bits in. They started to appear grey in parts when viewed at different angles. They were shiny enough from various polishes and cleaners we had tried but we were very disappointed with this shading, presumeably caused by the various products we tried. We washed the quartz down with warm soapy water then dried it. Then we applied and polished it as per instructions. MAGIC! The worktops were all black again. Nothing else we had tried did this. It still goes grey if wiped with a damp cloth but another application of this product returns it to black.