damascus,
A few more questions. Do you have any idea what the amounts of copal and turpentine were used in the early spar varnish mixtures? I suspect that this may be a more period correct mix for older lower grade Birmingham guns. In "Andy's" recipe, was it boiled or unboiled linseed oil? Could you add Vandyke Brown to this recipe as part of the staining process?
Thanks
Ken

I prefer wood to plastic, leather to nylon, waxed cotton to Gore-Tex, and split bamboo to graphite.