Varnishing Oil Paintings: When, Why, and What to Use (Myths vs Evidence)

Lesson Introduction

In this Technical Studio Session, we examine varnishing through material evidence rather than tradition.

The recording below covers:

• How oil paint hardens over time
• Why solvent sensitivity matters more than “breathing”
• The science behind oxygen diffusion through varnish films
• What retouch varnish is — and what it is not
• When presentation pressure conflicts with best practice
• How to evaluate risk without creating long-term complications

This session is intended to clarify decision-making, not prescribe shortcuts.