With hobbyists painting models this February, I noticed several discussions about possible yellowing of primer, paint, and sealers. As artists we want our models to be enjoyed for many years to come. And, hopefully, their coat colors will remain true. I have been customizing since the late 1980s using a wide range of art supplies with a wide range of results. Although I do not have access to all of my work, I haven't seen any yellowing of the primer, acrylic paint, or sealer. Yet, I was curious about the discussions on Facebook. Was this an issue? Was it an issue with supplies that I used? Being married to a color scientist who works at a paint manufacturing company, my first thought was to run an... ex ·per·i· ment noun | ikˈsperəmənt , ekˈsperəmənt | a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact My subjects Step 1: Prime four Breyers with my usual primer Rust-Oleum 2X Ultra Cover in Flat White, le