Prepped and painted remaining stiffeners. Cleaned up a few thin spots on the rudder skeleton parts.
Tried to be more patient with the primer this time. Only two passes with the rattle can then wait for the first coat to dry before spraying a second quick coat.
Proper safety equipment is important, even with a paint booth and exhaust fan to contain and exhaust the fumes, it still gets a bit excessive inside the shop after a session.