Normal electrical insulation tape along the blade edge so it goes half half around the edge, pulled tight as you go. Around blade, around shaft, around blade etc, about 5 -10x
The specialist Sup shop I got my Sup from don't recommend rail tape and don't even sell it I was told, they recommend the electrical tape on the paddle there opinion is that the rails on a sup are strong enough to handle a knock from a paddle.
Always had rail tape in the past so I will see how it goes.
Anyone else reckon its not necessary to tape rails?