I want to make my gallon of FK 425 last a little longer. Is it alright to make 1:1 ratio of FK 425 and distilled water. I couldn't find any topics on diluting 425 with the search function. On another note I got a sample of FK 303 glaze. Can I apply the glaze under a layer of Collinite IW 845. And if I can, will it reduce the durability of the 845.