I have an '88 Bass Tracker that bilges itself quite often. I have inspected it fairly well and see no obvious large leaks and plan to seal up all the rivets and welds that look questionable. Does anyone have any advice on how to do this? What products and process should I use. Is there a lot of prep to the surface? Should I wire wheel the spots first or is a powerwasher sufficient? I just got the boat for a great deal and I plan to do some upgrades. Any help would be greatly appreciated.