Almost any damage you have on radiator or other parts you can solve welding with durafix. You can repair aluminum and zinc based parts with out a welding machine. Brazing aluminum with a propane torch and brazing rods.
All you need is a hand held propane type torch for small pieces. Produces a sound joint that is stronger than the parent metal. No fluxes are required. There are no fumes. Low 732°F. working temperature. Joins thin or thick parts.
An inexpensive way to repair a radiator or other metalic parts. You need a gas torch and some Durafix rods... and that's it.