When I'm making pitch glue I look for hard, brittle pine pitch, usually found on damaged pine trees(other conifers too). If it is not hard, brittle pitch you will need to cook out the turps or it will take forever to dry. To that pitch I melt in bees wax to reduce the brittleness and finely ground charcoal to add body to the pitch glue. I don't have a specific recipe. I usually cook the pitch to melt it add a little bees wax and let it cool then check the consistency. Then I remelt it and add enough charcoal to add body to the mixture.
Instead of bees wax you can use other plant or animal oils(fat) and instead of charcoal you can use fine saw dust or dried rabbit or deer poop which is basically the undigested roughage, just be sure it's dried out well.
Also with the pitch I make a simple varnish by dissolving hard, brittle pitch in alcohol. I use this on sinew arrow wraps and have coated arrow shafts with it. With the hard brittle pitch you get a smooth, non-sticky coating. If the pitch is not hard and brittle it will be sticky until the turps evaporate of which takes a long time. True varnish has a small amount of oil added.
I've never used verdigris so I can comment on that.
