radiator leak

[Fox]

Hi there,
i got 3 chrome towel radiators from the scrapyard, i 6'x2' and 2 4'x2'.
2 have tiny leaks where the cross members meet the down struts (hairline leaks that seal when heating is on but tiny drip when cold).
How can i, or is there a product to repair these?
thanks
Fox

 

[tamz]

How can i, or is there a product to repair these?

http://www.jcsd.k12.ms.us/jctc/mig-welding.JPG
This works best

 

[Fox]

How can i, or is there a product to repair these?

http://www.jcsd.k12.ms.us/jctc/mig-welding.JPG
This works best

haha, was thinking that myself
Fox