and then you take your long end and you wind above covering the edge and overlapping and then the low, then covering the edge and overlapping, there and again you keep working your way up and  down, a figure of eight until you get to the end of your bandage then tie away from the body in your reef knot, either you tuck your ends in or if that's awkward you can just put a sticking plaster over the ends to get them out of the way like that, so just tuck the ends in and i don't think your casualty's going to need a sling for a little graze like that