This cake was created using the frozen buttercream transfer method, just like my Powergrid cake.
Trenails are done. Next step is to apply stain.
Trenails are added using toothpicks. I used tape to define the location for the trenails. Holes were drilled along the line.
Here are some shots of the planking / caulking procedure. I first cut a length of strip to just larger than the required size, then slowly sand one end a little at a time until it fits perfectly. Then I cut a matching length of the plastic. Glue is applied and the strip is added as shown below, with a tiny space between the old and new strips.
Deck planking continues. I did a test fit to make sure my mast and bowsprit holes were still accessible.