They both built a RV-7 and primed their whole aircraft.
They said, they would never do it again! They would only prime the structural parts and not the alcad aluminium.
Because of their basic corrosion resistance there is no need to remove the it and then recover the same area with a less quality primer. and the primer will not even stick on the edges.
I will buy a ALODINE Touch'n prep stick to prepare the deburred edges and prime only the structural parts like the stiffeners a.s.o