Wow! Looking really divine, PGTIV! Bravo.
The mechanical stuff looks great but I really love the painting. IMHO, you have hit it on the head with the rib tapes which are so often over emphasized. And, as the other gents have pointed out, the spattering on the upper wing is superb. But also the staining under the spatters looks so realistic. Again, its the subtlety that grabs me. And love the areas behind the cockpit. I'm glad you parents sent you to art school, Leonardo. It shows.
Cheers from NYC,
Michael