No Primer build....

[drone_pilot]

I'm in SE New Mexico which is very dry also. I usually wear some of the 4mil Harbor Freight nitril gloves just to keep oils off of the skins. If I forget to put them on (and I do forget!), I'll often wipe them down with acetone. If the surface will be far from paint and solvents (like inside of wings) while the plane is being painted, I dont bother with the red print on the aluminum. If it stands a chance of coming in contact with a solvent (external surfaces, etc), I wipe the red lettering off with acetone as I really don't want red runny goop in my paint.

The only place I use primer is non-alclad, bare steel, or dissimilar materials (ie steal gear brackets bolted to aluminum bulkheads etc).

[Ed_Wischmeyer]

Well... My RV-9A suffered corrosive soot incursion from a fire in hangar two down from mine. If it had been primed during construction, damage would have been much less, and cleanup probably lots easier.

Granted, the insurance adjuster works in the humid southeast, but he was emphatic that all planes should be primed. And if you sell your plane to a humid climate, how might that affect resale value?

Just another point to think about... but I'd probably make the same decision as you.