Yikes. Isn’t oil on metal a no no if you ever change your mind. Oil left in the pores of the metal would cause any future painting to blister. Wouldn’t a dull finish clear be a better choice?
I would say that if one were to change ones mind and decide to do a grade a number one paint job, media blasting would be in order. Boiled linseed oil can be easily removed with a hot pressure washer, or probably with a detergent soap prior to media blasting.
