I have an aluminum 16' open fishing boat and it needs rivet/maybe hull repair. One of the previous owners beached it often which has caused some rivets (general area 5 ft. from bow and where bow centerline straightens out towards the stern, also the rivet line is port to starboard as well) to come loose and about a 5" long crack. It has always taken on a little water and I have tried patching (may not have prepped it properly though) cause some patch work has come off, but it has gotten worse. I have gone from bilging about 3-4 inches water from every 2 hours or so to to about 45 min-1 hour. My questions are should this be re-riveted or relayered and is there a good inexpensive shop in this area or should I make patching area bigger than what it needs to be, or a better method of patching? Thanks for the help!!!!!!