As far as I know there is no grain to plastic coating, so the dirrection of application shouldn't matter. I prefer Ultrakote as it shrinks around the wing tips great. Just remember not to use the high heat that you do for monokote. As far as I'm concerned it's your plane use the covering you want, OTS or not. Did my Jamison foam wing with Ultrakote.

I could be wrong, but I am convinced that Ultra Cote "sinks" more beneath the ribs when applied with the short dimension going span wise.  I have observed this twice, and removed the covering to redo it.

Now, I only cover with the length of the roll (2 meters, I think) going span wise.

As usual, YMMV--just my 2 pesos worth.

Cheers,
Jim

BTW, if you look very closely at the U.C. you may see very light marks (look like very light scratches) in the surface.  These marks have always run the length of the roll; made during the production process??  I put these on the bottom of the surface.

Jim,
Info received just in time.
Good observation, especially with a foam wing where minimal sag will contact the foam.
I wont take the chance, will go to local Hobby shop tomorrow for another roll.
Roger V.

Hi Tom,
Doing it this afternoon.
Second foam wing I have used it on.
Core from Crist Rigotti, highly recommended!
First half, outboard lower wing workied fine. It is a Tom Dixon style construction w/cap strips on the foam so no direct heat on the foam. Tacked @ 220 F, initial shrink @ 300deg F. Will do final shrink when all covered.
Back to work, uhhh, I mean fun - wing covering!!
Roger
ps thanks for the hinge glue reply.       will use on this plane (Humongous)