I have a new pine countertop that I'd like to match some existing pine kitchen surfaces nearby. The previous owners of my house finished the existing counters with raw linseed oil, so I decided to follow this process for the new pine surface — even though it is not a food surface, I decided a matching look would be nice.
I mixed 2 parts raw linseed oil to 1 part mineral turpentine, a ratio I found somewhere online that appeared convincing. As the previous owners did on the existing counters, I added a touch of stain to darken the colour just a bit.
I applied 3 thin coats of this mixture with a paint brush, allowing ~10 hours between applications, waiting for the surface to be dry to the touch.
Now, some 10 days and quite a lot of fan-blowing time later, the new counter is still very ... oily. It's dry to the touch, but leaves an oily residue on my fingers. A brown residue can be rubbed off on paper, and any paper left sitting on the counter blots up tell-tale oil.
The air has been relatively dry, and temperatures have been around 10 to 20ºC (50 to 70ºF). Edit: humidity in the 50 to 80% range, top stored indoors.
How should I proceed to get the surface to 'set'? Is it just a matter of more time and more air, or should I be wiping the surface down with something to get rid of the remaining oil?