What should be done if a run or sag occurs during application?

When a run or sag occurs during the application of paint, allowing it to dry and then sanding it down is the recommended approach. This method ensures that the unwanted imperfections are eliminated effectively without compromising the underlying layers of paint. Once the paint has dried, the sag can be sanded down to create a smooth surface that is even with the surrounding areas.

Addressing the sag in this manner allows for a more controlled and professional finish, as it removes the excess paint without risking further damage. Sanding also provides a good surface for subsequent coats of paint to adhere properly, thus enhancing the overall quality of the finish.

Waiting for it to dry and then sanding is preferable over applying another layer over the sag, as this could exacerbate the issue by adding more material that could sag further. Ignoring it is not advisable since even minor imperfections can compromise the visual appeal and integrity of the final finish. Lastly, removing the wet paint immediately can lead to further complications and result in a more challenging cleanup process.