Classtime

Nice work, great job!
I would be inclined to paint it flat black inside and out to use with paint stripper and black poly.
I stripped a frame this summer and when I set it on black garbage bags after 100 grit and a good slathering, the stripper would almost melt the paint off when it was hot from sitting in the sun.
Once it started doing that, you could add stripper to keep it going, still pretty labor intensive but a fraction of what it would be otherwise.