Cerakote by far....Hydrodip is a transfer basically that has a colored base coat (paint) and a clear top coat (matte or gloss)...You are building several layers of material. Cerakote is bonded to the frame basically because it's more like an epoxy than a paint, and it's thin film ceramic based rather than urethane or high solids like a clear. Goes on about .5mil so it's very thin and very strong.