Found a product by Eastwood-two part epoxy primer in a spray can. Just enough to do the job. Expensive but cheaper than gun paint. Primed both aileron balance bars and leading edges. Used a rag soaked with primer run through the inside of pipe to get a good coat internally.
Dimpled and primed left flap ribs and spar.
Riveted ribs to right flap skin.
Finished dimpling right aileron skin and spar, ready to rivet.