Thanks. The sea can be made from Plasticine that has been shaped by rolling a large ballbearing over it, but the sea above was made from heat-formed polystyrene foam covered in crepe paper stuck on with wood glue to give it a better painting surface. The masts and spars are all brass and copper tube and rod. The rigging is fine copper wire. The methods are described in the article "Bellmore, Miniature Sailing Ship Modelling," that was published in two parts in Model Boats in December 2018 (Vol 68, No. 817) and Januray 2019 (Vol. 69 No. 818).
Bob