I did a stock with boiled linseed - looks fantastic, but takes time and patience.

First I stripped the stock with paint stripper as it had been varnished.

Then applied a very thin coat of boiled linseed oil and rubbed it in using my fingers. The trick is to apply enough that it doesn't pool and go sticky. Let it dry overnight and repeat.

Great video here

https://youtu.be/mzVdsln29o8