Charlie Reeves and I have judged appearance at several Nats. Several years ago and after a number of comments and questions, we wrote an article about what we looked for when we determined how many points an airplane would get for appearance. The article was published in Stunt News and Flying Models and has appeared from time to time on these forums. This is what we wrote about how we viewed the appearance of the finish.
"Some paint schemes call for a high uniform gloss over the entire airframe. Other color schemes/airplane designs can be awarded high appearance points with a semi-gloss or even a matte finish if the finish is uniform and appropriate for the model and/or paint scheme. Inappropriate gloss of lack thereof, or the non-uniform appearance of the finish will result in loss of appearance points."
In other words, if a semi-scale or "near scale" stunt model was being judged, and the finish applied represented a realistic battle-worn aircraft and if it was well done, the airplane should not loose appearance points for the finish.
The situation with Ron Burn's Wildcat was an anomaly that never should have happened. That airplane was eligible for the front row. As I understand it, the people who were doing the appearance judging that year were not stunt fliers and evidently knew nothing about scale appearance.
Keith Trostle