Technically I can't see there are that many entry points in a frame for water to find its way in. That would leave condensation as the only additional factor. I would imagine that this would only cause minor surface rust on a steel frame, and that the gravity factor would send the surplus towards the bottom bracket, which should be greased up.Not heard of frame failure due to internal rust. Stays and forks have tiny holes to assist air circulation.
Technically I can't see there are that many entry points in a frame for water to find its way in. That would leave condensation as the only additional factor. I would imagine that this would only cause minor surface rust on a steel frame, and that the gravity factor would send the surplus towards the bottom bracket, which should be greased up.Not heard of frame failure due to internal rust. Stays and forks have tiny holes to assist air circulation.