I recently bought a carbon fibre Dragon Boat Paddle. It was on sale, a deal that couldn’t be passed up. I decided to buy it, then customize its blade for a more appropriate shape.
The attached pictures show how I changed its blade shape.
-secure the paddle
-scribe the desired shape
-use a flapper wheel on a grinder to remove material
-touch up the blade edge by hand sanding
I was careful not to take too much material off the edge, as the paddle blade has a foam core.