Which method is correct for reducing blushing in a paint job?

Reducing blushing in a paint job is important to achieve a smooth, professional finish. Lowering air pressure at the gun is the correct method because it can help to minimize the amount of solvent that evaporates too quickly, which is often a contributing factor to blushing. Blushing typically occurs when moisture is absorbed into the paint film as it dries, resulting in a cloudy appearance. By decreasing the air pressure when spraying, the atomization of the paint is altered, allowing for a slower drying process and thus reducing the chances of moisture causing blushing.

Other methods, such as using a faster reducer, may actually exacerbate the problem by encouraging rapid drying and increasing the likelihood of moisture uptake. Applying more color coats could lead to excessive film thickness, which may trap moisture, while skipping the reducer could compromise the paint's performance and adhesion, potentially leading to issues in the finish. Therefore, lowering the air pressure is the most effective approach to minimize blushing in paint applications.