I'm not only a painter/drawer, but also a paints manufacturer. There are some oil paints I make for sale. The whole variety of them includes more than 100 paints. They all contain linseed oil boiled with lime, amber colofony and/ or colofony glycerine ester, which are the most preferable resins for painting due to their low acidity. Making good binder is over 50% of success in this craft.