As an AOS and CSA judge, what I find offensive is overly glossy leaves, which is the usual result of using a commercial formula like Leaf Shine. It also can plug the stomata to some degree if left on.
Phals can have more of a sheen than other genera and it will be acceptable. Put the same gloss on Cymbidium leaves and they look very artificial. Judges look for a "natural" but clean look. The secret is to be sure the judges look at the flower and not be distracted by either super shiny or super dirty leaves.
I knew an exhibitor once who used pineapple juice. The upside was nice, shiny leaves; the downside was the ants loved it if it was not washed off and attracted every errant ant on the show bench!
Cym Ladye