Cooking of the raw resins for several days. In the interim sun thickening the walnut oil.
Cooking of the varnish itself combing the resins to the oil.
Making the natural colors from organic materials that were avaible in the 17th centuary.
Grinding the varnish and the colors togerther.
Applying the ground caot, followed byt the sealer caot, in turn followed byt the color coats. Letting it dry in sun or lightbox and final polishing.