My grill gets to maybe 450-500 most days. It's a cheapie. When I cook wings on it, I do 30-40 minutes on each side on the grates, no rack, at medium to low flame so it doesn't flare up. I watch them the whole time and move around 1-2 times per side before turning. When done they're good tasting, but wither burned or not crispy. I use olive oil as binder to hold the rub. Similar thing happens if I smoke them first in Smoker for an hour then finish on Grill.