One of the good qualities of Linseed Oil is that it has the smallest molecules of all mediums, so that it will adhere to any surface better than all other.
When the Linseed Oil is absorbed in the surface it will obtain Oxygen and swell, which will strengthen the adherence. That is also why it can wrinkle if applied too thickly. (Paint with too much oil added)
Like Marvin, I have bad experience with Alkyd for priming.
I would never use Mineral Spirit in Linseed Oil. Better Vegetable Turps or Venetian Turps if I need a thin wash. Mineral Spirit will always make the paint matte and I believe that it spoils the linseed oil.
Allan
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