BBU,
I have to agree with Nails, FWIW.
Remember urethanes do not act like resins with respect to the changes you get when sanding and polishing.
With urethane, the rougher the surface, the earlier it will hook and the more it will hook.
Sanding it finer and finer, gets more length and less hook and requires more dry, therefore handling less oil..
Polishing it gets you more length, handles less oil (you have to start more into the dry) and LESS BACKEND.
Good luck with it. It should work with the right surface and playing the right line. You should also leave a lot less splits.
"None are so blind as those who will not see."