I am painting a 1957 model Stauter, which is a 14' wooden skiff made in South Alabama. I have stripped all the paint but on the wood it is not rough, but wavy. You look down the side of the boat and see many waves in the wood. You can see the grain. How do you go about filling this? Should I lay up primer after sanding alot. I want the sides of the boat to look smooth and all flat and the same level. What can I do to acheive this. Please help, any responce is greatly appreciated. Thanks