Try using a good weld through primer and coat the hole thing in a product like POR-15 or Rustbullit before welding (not the weld seam).This will give you much more protection than the spongy type sealer that the factory used. It holds water and is why it rusted to start with along with no paint protection.
Looks like you are moving right along , those cowl welds are a pain!
Dave
Thanks Dave
All your help has got me here and is keeping me going.
I have the weld throught primer (SEM)
I also have a product called Zero Rust that Resto Rick sells. I belive it is along the line of a POR-15 and/or a Rust Bullet. I have read many bad things about POR-15 and heard first hand from several body shop guys
One problem I have is the corner of the window. The rust has come down that and got under the firwall as well. Not sure what to do there, lots of compound bends to try and re-create, any sugestions?
Thanks
Lunch