Attaching laminate scotia to skirting board

Hi,

I have laid my laminate flooring and now have to fit the scotia to the skirting board to cover the expansion gap. I have seen in friends houses this is done with staples or nails which seems like a good idea?

My questions are:

1. Are staples or nails better?
2. Is this staple/nail gun sutible
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   What size staples/nails should be used, the scotia is standard quick step shape 14mm at the widest point but about 7mm where the staples/nails would go.

Thanks very much for your help

James