Salopian, was just looking at James V. Howe's "The Modern Gunsmith" and amongst the formulas he mentions, he mentions this one:

"Formula Nº6

1 pint boiled linseed oil
200 grains gum arabic (dissolved in alcohol)
1 oz. alkanet root
200 grains rose pink
150 cc. vinegar
Heat together for one-half hour, but do not allow the mixture to come to the boiling point; just let it simmer gently. To apply this polish, rub a small quantity on the stock, and let remain for ten hours; then rub it clean with linen cloth. With a few such applications you will bring out a very superior finish."

One can only guess where he got it from,

JC(AL)

"...it is always advisable to perceive clearly our ignorance." Charles Darwin