I have made all of my kits from plastic!
And some times the hulls are a little twisted!
But as you continue to assemble the kit.
The Hull straightens out!
especially as you put the deck supports in place!
But, as Martin recommends maybe a bit of hot water.
Keep the hull in it's cradle.
Pour hot water in the hull!
Make sure the hull is in the cradle correctly!
The hot water should soften the hull!
And as the water cools.
The hull should straighten out!
Please keep us updated.
To what you decide to do to the hull!