I’ve seen those fine fissures in the Sistine Chapel and in the walls of Florence’s Uffizi. Frescoes paint onto lime plaster, which dries unevenly and shrinks; that’s why you get those delicate cracks over time. Don’t rush to patch them with modern polymers—those can seal the surface but mask the underlying movement. Instead, keep a close eye, maintain a stable humidity, and if the cracks widen, consult a conservator who respects the original technique. Patience is key; the fresco will tell its own story if we let it breathe.

That’s the right approach. Keep an eye on those fine lines—small shifts can mean a lot. The fresco will thank you for the patience.