My brother-in-law specializes in Aluminium and stainless welding and has done quite a bit of boat work in the past...his workshop is in the Bibra Lake area - Clark Crt to be exact.

ABC Welding Services
Aurel Burciu - 0412 374 521

I think he's doing some sub-contracting work at the moment by give him a call on his mobile...he's very easy to deal with. If you ring Aurel let him know his brother-in-law John recommended you to him.