Question: is gamvar a retouch varnish?
Answer: Retouch Varnish The ratios I've seen online are anywhere from 1:3 to 1:5 of Gamvar to Gamsol. Personally, I mixed up a retouch varnish of 1 part Gamvar to 4 parts Gamsol, this seemed to work just fine. ... The retouch varnish helps to unify the surface quality of the painting a bit.