I recently acquired a '76 Sunfish in fairly good shape that had been sitting for 15-20 years according to the prior owner. It had apparently been taken overseas to the Persian gulf while the owner had been a contractor and sailed recreationally. Salt water seemed to hit the bronze fittings especially hard, they all look pretty rough. I've not been able to loosen the deck-top drain plug. I put a lot of effort into unscrewing it but the bronze is so corroded the screw slot on the top is starting to strip off in chunks without any noticeable movement off the plug itself. While I know the best option is to probably replace the entire drain assembly with a newer plastic one, I'd really like to get the boat on the water this summer and deal with cutting an inspection port over the winter. It's also an Orange/Yellow hulled boat so a white inspection port wouldn't match the hull color very well. Does anyone have any ideas on how to get the bronze screw plug out? Thanks!