On the exterior of a plane I know of no product that will make an RB last. I'm like most people I know and don't use RBs more then once. Inside the plane I use them to help hold things like receivers down, usually as a helping hand to Velcro. I have a product called rubber restorer I found in an auto parts store that extended the life of them. This is inside the plane though. RBs would last for about a year inside the plane, the rubber restorer does extend that but for the price of a box of bands it is just easier and cheaper to replace them as needed. I have seen photos of how John hangs his planes with coat hangers and it looks like the way to do it to me. I have racks made in my shop and my planes are hung across them. The racks take up a lot of ceiling space and I can only store 4 planes on them in my little shop.