My old Barients prefer very thin greasing otherwise, the salt water
and alum-SS-bronze parts
all get together to make a hardened mess of the grease and seize the winch in the salt water
and baking sun. My next ocean xing I will use a long skinny nozzle bottle to squirt fresh water
up into the winches to help minimize the saltwater issue. Taking the winches apart mid ocean isn't so easy with the risk of pawls/springs, retaining rings flinging themselves overboard
even with a protective cloth hood
rig set up to prevent that from happening.
On the pawls/springs, I use a light machine oil.