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Oil Varnishes

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Retouch varnish is intended for use over partially dry oil paintings, or to replace gloss in "sunken in" areas. Retouch varnishes dry quickly, and can be used as an isolation varnish between layers of paint. Different manufacturers use different formulas; however, usually they are of a thin damar base. Application should be with an atomizer, air brush, or aerosol can. This will not disturb soft, undried paint layers.
Grumbacher Retouch Varnish
Damar varnish is made from a natural gum from a tree found in the Maylay States. It has little tendency to yellow, and produces a hard film (although considerably softer than copal) that is easily removed with turpentine. Damar remains colorless longer than other natural varnishes. Also available in a heavy viscosity that is helpful in formulating mediums.
Grumbacher Damar Varnish
A damar-based varnish that has a microscopically rough surface that breaks up the gloss reflection. This is done in different ways, but usually by adding beeswax. Matte varnishes are cloudy in the bottle and should be mixed before use. Useful on light paintings (snow scenes, etc.), but not generally helpful in dark paintings.
Grumbacher Matte Varnish
Damar varnish is made from a natural gum from a tree found in the Maylay States. It has little tendency to yellow, and produces a hard film (although considerably softer than copal) that is easily removed with turpentine. Damar remains colorless longer than other natural varnishes. Also available in a heavy viscosity that is helpful in formulating mediums.
Martin F. Weber Damar Varnish
Retouch varnish is intended for use over partially dry oil paintings, or to replace gloss in "sunken in" areas. Retouch varnishes dry quickly, and can be used as an isolation varnish between layers of paint. Different manufacturers use different formulas; however, usually they are of a thin damar base. Application should be with an atomizer, air brush, or aerosol can. This will not disturb soft, undried paint layers.
Martin F. Weber Retouch Varnish