Carving the hull planking
First I drew some lines along the hull. Next I carved the foam along the lines.
Filling the gaps
The next step was to fill the gaps. I used Pattex „Kleben statt bohren“. (I think it is called „No more nails“ in the UK.) Additionally I used the glue to seal the outer surface of the hull. This makes the model more robust und protects it against chipping.