Whatever the person doing the job suggests really. 1.2mm was requested by the previous welder. That is not set in stone.Would be piece of cake to make that from 2mm or maybe even 1.5.
1.2 sounds more hassle than it's worth due to distortion and polishing out limitations.
Good result then,I commissioned a member of this forum today, thanks to all that tried to add something to the conversation.
Is this for a trendy barbours shop buy any chance?
I don't know?What's the connection to a greasy jacket and green wellies?