petallus, your post hit a nerve with me, I don't have the hip replacement issue but I have had horrible skin problems in the past and wanted to cover myself up so I empathise. All kinds of scars are to be seen when people are on the beach and this thread confirms that none of us feel we're in the "get your body beach ready" gang. If it bothers you so much, could you get a bikini with those very fetching 1930's type shorts rather than a nickers?
Go for it x
jenn - I have a plain black swimming costume for swimming but for lying on a warm beach, reading a book, like you I enjoy the air on as much bare skin as possible. We Brits are not like other northern europeans who strip off happily for a game of beach ball. I suspect like some of us, they can't wait to get as much sun on their sun starved bodies as possible.