Am looking to buy a boat that is a real beauty except the Volvo Penta outdrive has some corrosion from what seems to be sitting in the water for a long time. At least that's what the consensus says (3 boating friends and the Marina). Would you consider re-finishing it? Would any Marina do it? Should I just leave it? Any danger to leaving it? Would post pictures but says I'm not authorized to do so. Thanks!