Ronnie,
There used to be a kit available with two metal strips that could be fiberglassed to the bottom to reduce the wear at the beach. I don't know if anyone uses it anymore. I had a hull crack and take on a lot of water sailing off North Myrtle years ago due to wear on the keels. I had someone fix it by pouring two strips of resin on the bottom using metallic tape to form molds. The wear on yours isn't much but keep an eye on it if you drag the boat on the beach.
Howard T.
16' Hobie
18" Cape Cod Cat boat