Hi, we built our pool and paved the backyard a few years ago. We are in the process of dealing our Cambridge pavers and are trying to decide if we should seal our porous travertine pool coping. we decided to finally seal the pavers to protect Them from stains, sun and we like the look more. What are the pros and cons Of sealing the travertine coping? wondering if the coping will become slippery getting in and out of the pool, especially for the kids. thank you.