Dissolve the shellac and the Rosin in 1 liter of denatured alcohol. Add the Castor Oil once the resins are completely dissolved. The Siam Benzoin is optional, it will enhance the sheen of the varnish and provide a permanent odor.
It’s possible to add to this varnish preparation some Gamboge to color the varnish with a nice golden yellow. It’s also possible to add some ultra penetrating stain to color the varnish, 30 ml / L.
Shellac can be replaced with an equal quantity of Canada Balsam or with some Venice Turpentine, this will enhance the clarity of the sheen while improving its resistance. The shellac can also be replaced with another dewaxed shellac.
