Poly is soft
Posted by: Kanoo
on Dec-19-12 11:12 PM (EST)
And a full cure can take a long time. Even green commercial paddles can dent easily before full cure.
WRC is soft too, so look at your grain. Look for tight grained quartersawn if that's what you're going to use.
Don't rule out other woods.
Also, you can try an epoxy base layer covered with varnish.