Well funny you should ask. :redface: I just so happened to have done one of these things to my self right after I got my 76 mrnr 21' Starcraft. I had gotten the floor out and was in the boat rinsing it down, just using the hose, water only. As I finished and was getting out of the boat(high sided) my right foot slipped on the slope of the bottom of the hull and my inside right ankle struck one of the aluminum stringers. Needless to say it cut me really deep and wide as my foot was moving in a downward motion.

Like you I decided it didn't seem that bad just a good cut. Well I proceeded to play Doctor myself and just clean it really good and then place the butterfly stitches on it, and figured it would be fine in a few day's. Well as some of my fellow Starcraft enthusiast here know it didn't turn out that well. I ended up finally listening to the SWMBO(what ever that is) as Rick calls them and going to the real Doctor finding out it was worst than I had diagnosed. It was badly infected (probably from all the years of fishing with nasty water and what not, maybe bait fish, fish slime, and salt water getting in the boat infection. Also after the Xray they told me I cut a chunk of my ankle bone off, No wonder it hurt like hell and still is. I lost out on a few weeks of working on my boat from this as well. So I say to any and everyone here if you are working on a boat and you get a cut no matter how small and insignificant you think it is. It would best to go ahead bite the bullet and go see the real Doctor right off save your self the trouble of getting a nasty infection from what ever nasties get down into the deep crevices of a boat.
The Doctors informed me that if that infection had gotten into the bone I could have lost my foot.

You can see pic of it if you want. If you have a weak stomach or are having a snack I don't suggest it. The pic of the foot is in my My Photos link in my sig.