OK, all the above works, but some are weird to me!
Yes, use very thin needle-nose pliers, and you would be better off doing it in a plastic bag so it doesn't fly off on you. You could use a needle or something thin, but you can't grab the clip for obvious reasons.
To get the piston pin out, just poke something in there that is small enough to only touch the pin, and push it out slowly. Once the pin is sticking out far enough, either use a pair of pliers to grab it out, but cover the pin with a tough cloth or a bit of rubber so you don't damage the pin. Very inexpensive and you definitely don't need anything special, just tools from the shed. Just don't do anything dumb to become the biggest tool there