Hello Mr Weistling! I'm enjoying a lot with this course! The room where I am starting to paint is not very well ventilated, so I'd like to go totally free from solvents. My question is what can I use instead of the mix of walnut alkyd and gamsol?. Perhaps Sennelier Green for oil Medium? Gamglin solvent free mediums? Only walnut alkyd without Gamsol? I'm a bit overwhelmed about how to go solvent free. Thanks and again... this course is awesome!!!