Quote:
Originally Posted by J-Mech
No, he's talking about welding with a torch. Like brazing, only without using brazing rod. You can weld it with the torch only, or add steel if necessary. I've used thin welding rod with the flux chipped off before. (1/16" or 3/32" rod) Can't use too thick a rod, or it will take more heat to melt than the deck metal.
I was also going to suggest that George, but it is hard to do if you don't know how. 
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FWIW:
Re bar tie wire and plain coat hanger(non galvanized) works well for filler wire.
And i'm not talking about welding with a cutting torch.
A welding torch is used with tips from about 000 to #5 is ideal.
Stick welding rod don't work worth a dam as filler rod with a torch.
Brazing and silver solder has it's place,I use it, but once a piece of metal is brazed, soft or silver soldered,you will never be able weld it later, as it is in the pores of the metal.
Gas welding is ideal on cooling shrouds with vibration cracks or broken mounting tabs on Kohlers ( of course any engine) as an example.

You can puddle filler wire in some pretty thin rusted metal, like decks, exhaust pipes/mufflers, etc.
If the metal is in good shape, a stick welder is my go-to weapon.
Mig/Tig is quick and ok but it can only go so thin on metal, then you blow through.
Gas weld you can go real thin once you learn how.
Like anything, practice is the key.
( I know Jon knows all this) but some might not, thus I mention it.
Just another old skool "tool" in a fellers box.
Oh,
as an afterthought, larger welding supply shops have actual torch filler rod as well as rods for things like 4130 chromoly steel.