: Hi there on the other side of the world!

Welcome!

: Im going to make me a paddle. Then I started wondering what surface epoxi
: attaches best. Is it a 80, 400 or 1200 sanded surface? Or even planed?

The finer you sand, the better the grain will show after finishing. Planing produces the finest surface (assuming a SHARP plane), but sanding is generally required to blend planed "facets" into smoothly curved surfaces. I typically sand paddles to 400 grit, as going finer than that on cedar doesn't seem to make much difference.

: This thing "kayak making" is FUN!!!

Now you understand why there are so many "addicts" here!