A) Don't use a spoon, unless you like wasting time. B) If you're using the pins from classic shaving, set the washer and clip the pin very close. I use cut nippers, and cut it right at the washer. The way the nippers cut, it leaves a peaked "V" shape, which peens nicely into a dome using a light ballpeen hammer and light strikes, finished off with a nail set. The nail set isn't, strictly speaking, necessary, but it neatens it up a bit, and makes doming the head of the pin easier. Just use lots of very light taps...as Bill says "about as hard as you want to hit your thumb with the hammer."