I've been a big fan of these ever since a trip across the Pacific long ago where we hand-pumped up to 20 tonnes of water
a day out of the bilge
without undue hardship. (400-500 strokes every two hours, night and day). The reason why is another story.
I'm looking to get an Edson
and would prefer to have it a permanent fixture, but from what I've seen, only the bronze ones will stand up to sitting for long periods with salt water
Bronze is not a desirable option for an alu hull
. So with an alu pump, seems to me it's either pack it away, shrink wrapped for emergency
use, or strip it and give it a really durable alodine conversion treatment + high tech paint
job. (or something more exotic: Nikasil? Hardkote? Nyalic? Inversalu? Metabis?)
Q1: Anyone tried anything along these lines?
Q2: Does anybody know for sure: Do recent Edson
alu pumps have a different surface treatment regime than the ones they made 20 years ago?