Only used 3 times with water. Took it to the beach and somehow it got scuffed just sitting on the side of a rolling cooler. (Pics 2-3).. still sitting on the side of the cooler the top got what it looks like it is hard water spots. (Pic. 4) I’ve tried everything to clean it but no luck. Luckily new owner can purchase a new top for it. Personally over the hydro wave due to quality so just trying to get rid of them. Maybe new owner can get touched up and epoxy it .