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.
![Plank with glue in place](http://blog.clockwork-orrery.com/wp-content/uploads/sites/4/2019/04/sultana_build_log_032_01-512x341.jpg)
Then the plastic strip is put into place between the two deck planks. I start at one end, then run my finger down the length of the strip. After that, the deck plank is firmly pushed into place and excess glue is removed.
![Black plastic fitted into the gap](http://blog.clockwork-orrery.com/wp-content/uploads/sites/4/2019/04/sultana_build_log_032_02-512x341.jpg)
And at last the deck planking is complete.
![Deck planking complete](http://blog.clockwork-orrery.com/wp-content/uploads/sites/4/2019/04/sultana_build_log_032_03-512x341.jpg)
One particular challenge was the hole for the rudder. This picture on the site ship25bsa.smallsquareddesigns.com was especially helpful in creating the detail of the hole.
![Rudder hole](http://blog.clockwork-orrery.com/wp-content/uploads/sites/4/2019/04/sultana_build_log_032_04-512x341.jpg)
Next I need to decide how to handle coloring the deck and adding trenails.