OOP 3-Bet Cold Call + Flop Donk

Hmm yeah good point, didn't consider flatting. Still, its only tough when he donks pot on a dry 9 high flop. A high or K high flops are easy as well as when he doesn't donk on this flop.

Are you calling or folding to a cbet with an overcard on the flop if you just call PF? Because theoretically Q, K or A should nail his range.