First I would like to say hello to everyone, I'm new to the forum and RVing. I recently purchased a 1977 ford Rv Brougham with 70,000 miles in very good shape everything works well exept there was a stain on the interior roof. I pulled down the complete int. roof all the 1/8 th plywood and found a small leak were the roof rack screws in the roof. It looks like my roof is made up of plywood with aluminum covering the outside top. before I put up any interior panels I need to repair any and all leaks there may be. Any advice would be very helpfull and appreciated as I'm sure I'm not the only one to ever have this problem. I want to do a good job but as cheap as possible. I plan on useing this RV for a few years. I can do the work myself. Thanks for any advice you can offer.