I am in the final stages of purchasing a 1984 Morgan 323. Surveyor pointed out some slight corrosion begining at the base of the mast. It has not yet attacked the mast and he feels if cleaned and treated it should be no issue. The rest of the boat checks out great with normal maintenance items needing attention like hoses and the like. Moisture levels were well below expected for a boat this old in the PNW. Does anyone have suggestions on how to treat the mast base plate?