I bought my boat from Carlton (PWM) and also kept the in the Potomac for 10+ years. The first time I pulled the coolers was after almost 10 years! (Ignorance is bliss). They looked really good and no leaks. Followed Tony from Seaboard on the process. Keep the boat at HHN now. I pulled the coolers 2 weeks ago, but have not looked at them yet, so can't answer your last question.