The SAM lung was designed as a prototype, something to perform a few seasons, not much more. As such, it was not sealed from the rain which over time resulted in substantial rust to the interior surface of the upper shell.
Starting in the spring of 2021 Trent Tresch scraped and sanded the loose paint. In December Kai returned to this effort, preparing the surface for primer. Volunteer Colleen Cooley and Kai Staats applied a coat of direct-to-rust primer, which both stabilizes the rust and prepares the surface for the final, enamel top coat.