These are parts for the side gallery of HMS Victory. The beams over and under the ballusters are extended so that they can be sanded to the right length and angle for the specific hull. The parts are a little bit fexible to follow the bend of the side galleries.
The parts can contain left over wax and grease from the production process, especially between closely spaced parts. This can easily be removed by hot water, dish liquid and a brush.
Painting with acrylic paint is recommended.
For more material information see: