Just a thought on healing the wounds after taking off a branch on azalea. As azaleas have such a thin bark, the cut is done differently.
The final shaping cut is made smoothly and shaped to be slightly rounded just a bit above the surface of the bark. Thus the healed scar tissue will be congruent with the surrounding barks surface.
Thus no concavity as the azaleas won’t easily fill in the depression left. So the cut is finished off with something that will accomplish this. I often just use wood chisels, but sometimes for medium or smaller branches a little seen tool called a convex cutter does virtually the same.
Cheers
DSD sends