Soldering to large metal objects
Large metal objects inhibit your ability to solder because they draw all of the heat away from the point of…well… soldering? Normally you would either have to leave your soldering iron on the piece of metal long enough to heat the entire thing up to about 800 degrees Fahrenheit (which can take a LONG time), or you would settle for a weak joint and end up hot-gluing or epoxying over it in order to make sure that it won’t come off.
However, by following these few simple steps, you can create a strong solder joint and not have to worry about the joint breaking.
Soldering iron (preferable)
More: continued here