AutoTracer wrote:

Thing I don't like about pressure treated (especially 2x4 and 4x4) is
the little grooves cut in the surface to identify it as PT. this
kind of ruins it for exposed work since you shouldn't sand this wood
extensively.

I have never seen any pressure treated lumber with grooves or any other
identifying marks cut into the wood.

Are you sure you aren't talking about the shallow scalloping that occurs,
from the planer blades, when rough lumber is sent through a planer too fast?