What do you mix paint with? Here are the the most common options: Floetrol is the most common but not necessarily the right choice for you. US floetrol is only a cost effective solution in the US and Canada. If you have to pay an expensive shipping rate, it's no longer the most cost effective. Retail Pouring Mediums generally offer the best longevity and archival properties, but that comes at a price tag. If these are essential factors to you, and you want to justify expensive paintings, use the