I am looking at a virtually new 1979 Sea Nymph 161fm with an evinrude 30 hp. I do know the original owner who says he has only used the boat a hand full of times and everything looks like it except when I pulled the motor cover off. It looks like the paint has come off of of the power head in places and the exposed cast aluminum has turned to a white powdery texture, is this normal or does this mean the motor was run extremely hot at one time causing the paint to fail? He says it has never run hot and he has always seemed like a very honest person. Please let me know your thoughts, he says it has the original prop on it and it does not even have the paint wore off and neither does the skeg. The boat has always been stored indoors since new would moisture from the garage cause this? This is my first post I hope someone can help.