I know that Charles Poliquin’s Biosignature identifies fat on the IC as being related to dietary carbohydrates, and scapular fat identifies genetic carb tolerance. So if you do a skin fold test on your scapula and get a single digit reading, you are probably carb tolerant, just eating too much or at the wrong time.
I know that Poliquin says to go Paleo if you are not carb tolerant, and even if you are keep them gluten free. There are also supplements you can take. R-ALA is amazing, as is green tea extract and cinnamon (the best according to Tim Ferris’ experiments is the species Saigon Cinnamon, available as a spice at Whole Foods and sort of hard to eat). Cissus Quadrangularis has had some statistically significant lab results in lowering glucose and causing weight loss by attacking insulin.
Maybe post a picture though to show us what we are dealing with? If you really are both built and lean, it may be wisest to take the earliuer poster’s advice and accept yourself as imperfect, but nevertheless excellent.