I'd be a bit careful putting the linseed on to "boil". I melt some beexwax chips of the chunk in a baby food jar (floating in a saucepan of water); add the (ambient temp) BL away from the burner, then add a bit of mineral spirits, sometimes shoe polish for color cast. I like Simichrome metal polish on a rag for buffing. I keep the rag with the wax and the embedded Simichrome in a sealed plastic coffee can and just keep using it sort of forever. I guess I'm the Shoeshine Boy cause I like a little shine.
jack