Michael,
I have tried virtually every one of Rob's mediums, including oil of spike, in several different mixtures. Most of them tack up quickly and cannot be worked into for very long. There seems to be a long period of time between the point where you can paint "into" them and the point where you can paint "over" them. I am not saying that there is anything wrong with Rob's mediums. They are excellent for other people. I'm just saying that the unrefined walnut oil made by Loriva, with a little siccative de courtrai added, is perfect for me. It is very slippery and soft feeling, and remains so for about one day, and the next day, it is dry. There is no tackiness in between. There is no stickiness on my palette. It's like velvet until it dries.
It's cheap and available. Try some, and if you don't like it you can use it in your salad dressing.
