Will I Encounter Issues If I Revisit a Painting that has been Sitting for Months?

The primary problem when a painting sits and dries is that the oil paint layer becomes hard.
The primary problem when a painting sits and dries is that the oil paint layer becomes hard.

At Hotel Metropole Monte-Carlo, the Artist Djiango Will Paint Portrait Souvenir - Bloomberg

When should you rework a painting?

Girl Reading a Letter at an Open Window - Wikipedia

The Story of a Painter”

Painting

Provocative Drawings That Confront the World

Alex Katz's Life in Art

Laura Nugent Paintings

Meet artist Mary Jhun: Exploring mortality and obsession through her art - The San Diego Union-Tribune

Break the Ice: How to Paint a Complete Stranger's Portrait

Carroll Dunham's Paintings Make You Squirm

Inadequately Prepped Paintings: How to save a failing artwork