I have used Ethanol to extract colour of Alkanet root. Easy to strain the stock with. Then I use Rustins tung oil and several coats.. Pumice powder dissolved as poorfiller. Add some alkanet to tung oil to get the colour right.

Last coats are with Rustins Danish oil - it will leave a nice finish but also harden and seal the wood quite well. I use renaissance wax on all my guns to protect them from fingerprints, salt stains, water, grit, blood etc.