Canada Balsam Medium Recipe

My order from Wood Finishing Enterprises arrived today. Although the focus is, obviously, wood finishes (particularly ingredients for musical instrument varnishes, it seems), it's a terrific resource for some expensive and hard-to-find oil painting materials. They carry Canada balsam at a reasonable price, or at least a price that I can almost justify after I figure how much I use to make a medium and then how much of the medium I use in one of my normally not very big paintings: $27 for 4 oz.

Here's the medium recipe: 1 part Canada balsam, 1-4 parts stand oil, 1-4 parts oil of spike. Stir the stand oil into the balsam (warm it gently if necessary) and then add the spike. I normally make up only a couple of ounces at a time in a small jar, and use it sparingly as a couch or added by drops to the paint nuts on the palette. It has a wonderful aroma, though too much spike will give me a monster headache. This is the one to use for subtly fused edges and a bit of the "jewel-like" effect.