Hi all, I'm finding that lilos and inflatable boats etc. don't last long in my pool due to the sharp edges of the coping stones surrounding the pool. Is there a paint or product that will help get rid of, or significantly tone down, the sharpness of the underside edges of the coping stones? I've included a photo below to show how they look. Ignore the green water - I'll be chlorinating the pool soon with summer on the way in New Zealand :-)
Also, especially if there's a suitable paint to use, what would be recommended for treating the moss growth on the edges of the coping stones before applying paint? Waterblasting doesn't seem to work very well.