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
What is a varnish, and how is it used in fine art? - Quora
What is the best or most recommended medium to use for oil painting? - 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
Grumbacher Damar Final Varnish for Oil Paintings, Jar, #5692, 2.5 Fl Oz (Pack of 1) : Tools & Home Improvement
Master Your Mediums: A Guide for Oil Painters: PART I of II
Can you mix damar varnish with stand oil and turpenoid for a painting medium? - Quora
is considered to be the best of the natural picture varnishes. It increases the brilliance of colors and provides moderately high gloss. Damar
Damar Varnish
Any artists here who deliberately don't varnish their paintings? Do the paintings get dull over time, or are they harder to clean? And are there other ways to preserve paintings without varnish?
What is the best or most recommended medium to use for oil painting? - Quora
How to Varnish an Oil Painting? 7 Questions for every Artist