A good start is to read Aluminium and the Sea from Alcan, it's all in there, here's the link http://www.alcan-marine.com, select Library -...
Wellydeckhand, for what it's worth - there are more places you can get hands on 'Bruce Roberts' plans, cutting files and kits if you like the...
I don't think the cost is the reason, both filler wires are simmilar in cost. Take a look at the attached files and decide for yourself, both...