All good inputs. I would be following MAR-K's test procedure and using POR-15 topcoated with Beyr exterior paint. I think it looks pretty factory. The truck has really nice original paint rather than patina. Could be buffed out perfect, but I'm leaving that up to the buyer.
I am leaning towards painting it. The strips are bare metal because that was the plan. So I'd have to at least paint them if I left it. Either red or black