In article ,
James Gagney wrote:

Today I tried drilling a hole in the guardrail - but the drill bit
wouldn't make a dent.

See picture he
http://www5.picturepush.com/photo/a/...mg/9153893.jpg

What would you use to drill a hole suitable for mounting a garbage can
where there is no electricity available?

Drill bits aren't supposed to make dents.

To drill metal, you need a sharp, quality drill bit. Not the cheapo home
improvement center bits. You also need some cutting oil, although
lubricating oil will do in a pinch. Also, start with a 1/8" drill and
work your way up. High RPM for the small bit, lower as you get bigger.

Lastly, lean into it. WIth a drill press, the quill handle gives you a
lot of mechanical advantage without you necessarily being aware of it.
WIth a handheld drill, you have to put your weight behind it. If you
don't, the drill will just get dull, rapidly.

For the guard rail, since it's curved, you might want to center punch it
to keep the drill from walking.