Bottle in the sack
Hi Wolf, maybe a bit late, but this is my "solution" to the gas bottle corrosion problem: I pack the bottle and the spare bottle in good plastic trash sacks. The spare bottle with the sack opening down, sealed by a rubber band, the bottle in use with the sack opening up, with a rubber band to seal it around the gas outlet. Since we have a bottle exchange system in Holland we get a freshly painted bottle with every gas purchase, so the corrosion problem is manageable. I would never store a gas bottle inside the hull or sacrifice the deep locker in the cockpit. One other thing: I installed an electric heater in the hot water boiler and our gas consumption was about half of last year's! Happy sailing.