This was a quick session to spray some primer on the interiors of the Horizontal Stabilizer skins to provide some extra corrosion protection (beyond the Al-cladding provided from the factory). As with other skins that I've already done, I'm choosing to save weight/waste by only priming the areas of the skin that will be in contact with other internal components, since those are the areas where moisture will tend to accumulate and promote corrosion.

I started by scuffing the contact areas with a Scotch-brite pad to roughen up the surfaces and provide slightly better primer adhesion. Then a quick wipe-down of the surfaces with acetone to clean off the scuffing debris and any oils. Finally, a quick spray of self-etching primer and then resting until dry.

What's next? Time to start air riveting the nose ribs into the fronts of the skins.