Why is alkyd paint rarely used in body shops?

Alkyd paint is rarely used in body shops because it fails to fully cure, making it susceptible to various forms of attack, such as moisture, chemicals, and environmental factors. This incomplete curing process can lead to issues like peeling, fading, or chemical damage, which are detrimental to the durability and longevity of a vehicle's finish. In contrast, modern automotive paints, including urethanes and acrylics, are formulated to cure fully and provide a harder, more resilient finish that better withstands the rigors of automotive use.

Regarding the other options, while alkyd paint does have a high gloss finish, this characteristic does not impact its usability in a body shop context. The claim that it dries too quickly is misleading, as drying time can be managed with proper techniques. Lastly, while alkyd paints may be more suitable for certain outdoor applications, the key factor in their reduced use in body shops is primarily related to their inadequate curing properties and the resultant vulnerabilities in performance.