[Jeff_H]

Trim ballast was pretty common in boats at one time. But, that said, there are a number of problems placing the concentrated loads of lead ballast just against the hull. F.G. hulls are really not designed for high concentrated loads for long periods of time. Areas where large concentrated loads are imposed are generally strengthened to prevent localized fatigue. The other concern that I would have is with condensation that would form between the lead and the hull and which might keep the glass at an elevated moisture level and which might then cause blistering and/ delamination.

Jeff