Local 8 owner polished his airfoil gear.
I got a set of the airfoil gear and they showed up on a hot August day. I pulled one leg from the crate and looked it over then pu it back in the crate. A week later I opened the crate to show them to a friend and the one I removed with sweaty hands had perfect imprints of my fingerprints and palm prints. I took them home where I removed the corrosion with etch and a scotchbrite and then alodined them. No issues since.
Etch and alodine while installed would be less than ideal but possible. If you don't have any of the rest of the gear installed (axles, brakes etc) it would be easier and probably better.
Priming with a good primer would also be simpler with no other equipment hung from the legs.
Whatever you do, protect the brake fluid passage from whatever treatment you decide on. Probably not a good idea to get etch, water, alodine, primer whatever up in the there.
For etch/alodine on large and odd shaped parts I cannot dunk I use regular old spray bottles to etch and alodine. Normal health, safety and hazmat warnings apply.
I will take a scothbrite pad with soap and water and clean/scuff the part. Rinse. Using a spray bottle filled with etch I will spray the part and scotchbrite again. Let it stand for a minute or so but never let it dry out. Rinse, spray on alodine. Let it sit for a minute or so but never let it dry out either. Rinse. Done.
RV-8 with the Showplanes Fastback conversion
Emp completed except for glass work
Wings completed except for bottom skin and glass work