Oiling Out: to brighten dull areas and prevent 'sinking'

oiling out
If a painting has lost its vitality and become dull, all may not be lost. This usually occurs due to what is known as ‘sinking’: when the top layer of oil has been lost to the layer underneath. There are usually 3 common causes: an over-absorbent surface, using too much solvent, or not enough medium. Using the ‘oiling out’ technique can give the painting a new lease of life.

As ever, prevention is better than cure, and the best way to avoid ‘sinking’ on oil paintings is to apply artists’ primer such as Oil Painting Primer to the surface before you start.

However, as you build up oil colour in layers, the different drying rates can also result in a paint film with varying degrees of absorbency, which show up as dull spots rather than a complete dull area. The trick is to treat these dull areas as soon as they are dry. Apply Artists’ Painting Medium sparingly to a clean cloth and rub gently into any sunken areas. Wipe off any residue and leave to dry for a day or two.

If you can still see smaller, dull areas then repeat the process until the painting has regained an even sheen. Avoid using varnishes to refresh a dead painting. For a faster drying oiling out medium, use Thickened Linseed Oil diluted with 50-percent white spirit (mineral spirits).
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