Frank,
Don't do it!!
Yes you can use boiled linseed oil as a lubricant, or white polishing oil, but, oil can weaken the film of the polish so making it even more susceptible to damage. It's very difficult to get rid of at the later stages of polishing. You will need to spirit off the oil (this involves using neat spirit in your rubber and polishing until you remove the oil film).Much better to practice your technique using some plywood first (make up a 2 foot square). Brush on a couple of coats, let it dry, cut it back with 240 grit grey paper (gently) then start in with a rubber. Once you can get a reasonable finnish on the ply, move onto your project. A good book and video on polishing is Philippa Barstow and Alan Waterhouses.
Good luck.