Poly & varnish are surface coaters that are layered on, linseed oil and the Lin-Speed oil I use (drys much faster) soaks into the wood pores and hardens giving a much better finished project.
If you have a maple stock, especially curly maple apply a tannic acid wash, wait for it to dry then apply Aqua Fortis (nitric acid stain). It will look greenish, when dry run a heat gun over it until it turns a beautiful reddish color, the previously added tannic acid will make the grain "pop" then finish with lindseed oil. Adjust aqua fortis for a light to dark finished look.