Hi all. I am hoping a Dulux colour consultant or paint specialist can help me. Dulux Australia gave me the formula for a grey paint I love to get made up here in NZ, where it is not usually available. My dilemma is the formula is for a 500ml test pot. How do I upscale this to 10 liters to give to my painter so he can order the paint for our exterior paint project? I need to give him the formula and not the name of the colour as the NZ version is different from the Aussie version I want. Thanks in advance.