If you're on the fence about alodine, something to consider. A friend who lives near the FL coast made test samples of 2024 with no coating, alodine only, alodine/primer, primer only, etc, and dipped all in a bucket of sea water every few days for many months, leaving the samples outdoors near the bucket the rest of the time. The alodined sample survived as well as every other protection method. He has built a -6A & -9A, & alodined interior parts & then sprayed the interior (rudder, stabilizers, etc) with Boelube. He's a retired engineer for an aerospace corp, & I trust his opinions.
Alodine is a bit of a pain to do, but the process weighs effectively nothing when applied to the parts. If weight is a concern...
Charlie