Varnishing Beaded Birch Paneling For Skin (Like Woody's!)

I have no shame, so for those here familiar with Woody's TD, I'm going to copy his skin. (Plus other things.) He used two different designs of beaded birch paneling for the sides and top.
In a previous post, he said he spar varnished it in 10 coats. Since 10 coats is one hell of a job, especially for 3 or 4 pieces (front and back, I guess), I was considering buying the paneling, and doing this in stages while I work on other parts of the project. Like, when I get real aggravated fitting a piece of wood, I'll take my anger out on that plywood. (At least I know how to use a BRUSH!)
I don't have a garage, but I can probably place the paneling under a house eave to save it from torrential rains.
Can anyone see a big downside to this? Like for the top, if it's varnished with 10 coats, it's still going to bend the same, right?
Woody? Help?
In a previous post, he said he spar varnished it in 10 coats. Since 10 coats is one hell of a job, especially for 3 or 4 pieces (front and back, I guess), I was considering buying the paneling, and doing this in stages while I work on other parts of the project. Like, when I get real aggravated fitting a piece of wood, I'll take my anger out on that plywood. (At least I know how to use a BRUSH!)
I don't have a garage, but I can probably place the paneling under a house eave to save it from torrential rains.
Can anyone see a big downside to this? Like for the top, if it's varnished with 10 coats, it's still going to bend the same, right?
Woody? Help?