I acid etch (Alumiprep), but usually don't bother with alodine. The important stuff gets alodine, rear spar carry-through, probably the longerons, but that's about it. It's horribly toxic stuff and not likely necessary. When I build an airliner that gets soaked in deice fluid daily for 6 months of the year, and left on the ramp during every downpour then I'll alodine everything.
Empennage Passed Pre-close Inspection
Wings mostly done
Dash 8 day job is financing the RV8
Donation till September 2021