Well I finally tried this product.

I've coated our Zavs. The blade plus 8 inches up the shaft. Two base coats and two top. It added .6 of a gram to the weight and an ugly hazy white rough to touch finish.

In the water the blade felt exactly like it always has. (same pull)
As soon as you pull it out it drips for a split second and then it's dry. The front of the boat didn't get a single drop of water sprayed on it while paddling sit and switch.
An Indian stroke is dead silent because the water doesn't creep up the blade at all.
Any stroke taking the blade out of the water is a lot quieter now with less spray and a lot less dripping.

Durability doesn't seem to be a strong point. Hard rubbing will remove the coating easily. We'll see what the future brings on this. Surely no poling for this product.

Canoers using kayak paddles can really benefit from this product. No more wet boat from all the drips. Same probably goes for kayakers.
Canoeists with ottertails (or like) will benefit for the quietness and overall weight savings of not picking up all that extra water and Zav owners for the weight savings.

So bottom line is I'll try it for a season and see how it goes.