Michael Daly wrote:
(PeteCresswell) wrote:

Can anybody venture a reason not to do this?

The sharpness of the edge might affect the flow of water over the edge
and the flutter to some extent (wing won't flutter, though). It may not
be enough to feel with anything other than a fancy test rig. If it's
not your prime racing paddle, sand away - better to be safe. Otherwise,
contact the manufacturer.

Rounding the edges of a typical thin fiberglass or CF blade would
IMPROVE the water flow characteristics, if anything. After getting cut
myself once, I started doing it on all my Euro paddle blades. There were
no negative effects and I never got cut again.