Colin, Dicky.
This is what I have used for the waterline and white depth markings. I'm at odds with myself whether to order some in black because all I need are 10 pieces 0.5mm thick by 2mm long 3 pieces o.5 thick 3mm long and I have no other builds planned that will use black. I'm really a grey boat builder, but thought I would do the Trent because I always fancied one from there conception. I may however do a 1:20 Tyne at some stage in the way distant future as I have a set of plans for one.
Mark