Because they used a Polyester resin back then. It is cheaper than Apoxy Resin. But if you can sand all of thim out and put on a Good Apoxy Barrier coat paint, It should help stop the blisters. Thank You so much for your video's. It is a Great thing to take us away from some of the things on the News lately. Ok until next time, Aloha from the Big Island🏝 of Hawaii🌋! Cheers 🍻 and Aloha
@@kptbillburkett8735 I'm glad our channel can be a positive thing to watch as a break from the alternatives... I appreciate content like that too. And yes! Hopefully the barrier coat and apoxy patches will be a solid repair for years to come.
