What do runs and sags look like?

What are runs and sags?
Runs and sags refer to defects where the paint film shows droplet-like or wave-patterned marks. This is generally caused by too low preheating temperature, excessive thinning of the paint, or applying the paint too thickly.
What causes runs and sags?
Problem analysis: Increase the preheating temperature, reduce the thinning ratio, and reduce the spray thickness.
How to resolve runs and sags?
Solution: Increase the preheating temperature, reduce the thinning ratio, and reduce the spray thickness. If the problem persists, replace all thinning water with fast-drying thinner.
