I used finger nail clippers for the beaks and toenails. The toenails are the same with any dog or cat, just remember to not trim too much and get into the quick. Mine were pretty easy going and I could see the quick pretty easy in the bright sun.
For the beak trim I again used the finger nail clippers, as suggested by Sonoran Silkies, and did it on a nice bright sunny day outside. I held them in my arm like a football, on their back with their butt in my armpit and their head in my left hand the sun. I held the bird's head in my left hand to open their beak. I used my right hand to clip them with the clippers. The bright sun allowed me to see in their mouth and it was easy to tell what to trim and what not to trim. It looked like where a fingernail would meet a finger. The part I trimmed was transparent in the sun (the fingernail looking part) making sure to stay away from the more sensitive non-transparent parts. I trimmed little by little until taking what I needed to off. I then used a finger nail file (emery board) and filed the edges smooth and shaped it back into the rounded V beak shape. They fussed a little bit but not much at all and they felt no pain. Once I was done they looked great and there were no marks to tell what I had done. They seemed to like it once I was done. The two that were quite shy seem to have come around a bit because they don't scatter as much when I am in the coop with them now. Still not eating out of my hand but making progress.
Hope this helped. Go for it. It was really quite easy. This was my first time doing it which is weird because I never had to trim my birds in the other coop. Their beaks never curled down like these.