I’ve started fairing the Stern portion of the Hull… Especially under the Transom.
I’m using a File to file down the Bulkheads so that the Planks will lie flat across them.
You file down 2 Bulkheads at a time until the file lies flat across them.
I also use Sandpaper on a Holder…
I’m using 120 Grit Sandpaper paper. It cuts just enough but to too hard.