I believe that CLC sells some brass half-round stock that can be used for this or rub rails.  I put a long stainless steel rub strake from West Marine on the skeg of my EP, bent the tip to wrap around the aft edge a bit and screwed it in place.  It's worked great.  I'm doing the same to my PM.

   Thanks Skully,  I will look itnto West Marine.

NickL

   I have bought a half round brass strip for the skeg but not sure to use it because it's a bit heavy. The shop told me to bend it carefully. Drilling the holes for the screws after bending it. Otherwise you get ugly curves.