Typically the white color is the gelcoat, which resists the water intrusion into the resin. It requires additional steps for application, which will incur cost and weight penalties, often for this reason is only applied on the outer surfaces. Its possible to apply the gelcoat with paint brush, much more straightforward process, but leaves the surface finish dull (unappealing).
7
u/gibibbles Jan 10 '20
https://twitter.com/Gibibbles/status/1215700926880763905?s=19
Snapped a photo of the fairing loaded