I cleaned, etched, and primed one side of the vertical stabilizer parts and inside of the skin this evening. The paint booth worked great!
I followed the method described by RV8SA on YouTube (Stewart Systems Prime Video). I purchased the same 3M AccuSpray Paint Gun and it worked perfectly.
I painted one side of all of the parts and will paint the other side tomorrow. Cleanup was quick and easy with no solvents required. Time will tell how durable the primer is once I start riveting.