Answer (1 of 7): A general medium for oil painting should be just the oil. Linseed (flaxseed) oil, sun thickened linseed oil, and calcite sun oil make good mediums that do not require the use of toxic solvents. The simpler the medium for your oil painting the better. Damar should be used only as
Add Gloss to Your Oil Painting with the Best Damar Varnish –
What is the best or most recommended medium to use for oil painting? - Quora
Oil Mediums / Varnish / Maroger / Damar / Liquin / Acrylic vs Oil What artist need to know
Winsor & Newton Professional Dammar Varnish, 250ml (8.4-oz) Bottle
What is a varnish, and how is it used in fine art? - Quora
What is a varnish, and how is it used in fine art? - Quora
For oil painting, would a mixture of linseed oil and damar varnish serve as a general medium? Would the damar serve as a final varnish? - Quora
What is the best or most recommended medium to use for oil painting? - Quora
Can you mix damar varnish with stand oil and turpenoid for a painting medium? - Quora