Fixing your own radiator?

[Baralheia]

I want to repair the radiator in my truck (it's a Copper/Brass 2-row for a 1985 truck W/5.0L W/AC W/AT) but I don't really know where to start. The two main places where it's leaking are at the tube-to-header joints (with some solder bloom inside the tank on the tubes) and at the tank-to-header joints. What kind of preparation do I need to do to the inside and outside of the radiator to clean it and ready it for the propane torch and solder?
Also, what kind of solder should I use - 60/40, 95/5, etc?

I eventually plan on purchasing a new radiator for this truck, but I don't have the funds to buy a new one right now - so I hope to try and repair it myself.

Anyone have any tips or pointers about how to clean and re-solder this radiator together?

Also, what are these radiators painted with, just a flat black primer?

Detailed repair proceedures would be greatly appreciated, either here or via a link.

Thanks in advance, guys.