Thanks Uwe,this is how copper tree nails look like on the L’Amarante from Roland Vlahovici,he used teak as me for deck planking.Hallo Zoly,
I am using usually 0,6mm in scale 1:48, so I guess in your scale would be 0,8mm a good looking diameter.
Nevertheless I would first try it on a dummy deck - especially if you want to use brass or copper wires, so to get a feeling for the nailing.
And I would prepare a bigger dummy area, maybe 5 to 10cm area......
I have the feeling, that the copper wires with the dark timber of the deck could look like very good - (nevertheless on the original ship they were made out of timber) - pure question of taste