Goggles.
Gloves.
Safety glasses.
Closed mouth.
Cut in the water, so they don't squirt on you!
Make sure you have no open wounds when playing with them/hands in the tank.
Pay attention when cutting the polyps and don't cut yourself!
As far as I know all zoanthids have their protective chemicals, palytoxin.
Some more than others.
It is almost impossible for you to know the differences between species nowadays with the cartoon named polyps, so if it's a Palythoa sp. or Zoanthus sp. doesn't even matter. Both could contain the toxins anyway.
Just be very careful.
No kids nor pets around when fragging, please.
Good luck and have fun!
Grandis.