a little surfing. I managed to cut my foot pretty bad surfing at Poipu said:
learned a highly effective way of dealing with reef cuts from the Tahitian locals I was surfing with 25 years ago, where reef cuts were guaranteed pretty much on any wipeout...cut a local lime, not lemon (different enzymes) in half and scrub the reef cut several times a day with it. The application bubbles as it neutralizes the bacteria then turns black and seals it. Have used this trick in Fiji, Indo, HI and other various locales, turned a lot of other surfers on it, always worked.