Reply to Demands on soldering iron

Hi there,

I want to do the arcade button mod on my vci-100 in the near future. I do have a soldering iron at home (it's pretty old). My dad said that he didn't know if the iron is good for the job. So I know it's been used a lot and is old, also it is 100 Watt. So will it be good enough or are there more things that I should know about a soldering iron that will be good enough for the job. And please keep it clear because i'm a bit of a noob in electrical things.

Thanks in advance!