That pic there has me wondering what finish is used---you can clearly see the parts seams, so it's not puttied/sanded/painted----but it is awfully smooth for not being overtly glossy---yet the big wing piano hinge is not the same shade as the rest of the plane. Un-puttied seams and painted?
I'm trying to figure out what I'm going to do--I am NOT going to paint the white--not on something with this many moving/scraping parts, all white areas will be left white plastic. But I'm wondering if I should use pens for panel lines, a wash, or what. And then do I seal it? Again---I intend for mine to be "played with" and "toyistic"---thus the finish needs to be durable, and not impede anything. Layers of paint and clear may cause clearance issues. I never seal pens, and that one is clearly penned with pure black ink--and it looks remarkably good for that---if that's over base white plastic, I may go with that. But if that's penned ink over painted white, I may go with a wash, to really eliminate as much "plasticy" look as possible.