Do I need to buy end papers since they're sponge? How do I use them?
There are many threads on this.
Basically, some like end papers, some don't. Many say that it does make the ends smoother, while others say shaking the excess water from the roller before rolling helps with frizzies. I personally don't have time for end papers when I'm using caruso's.
Some use setting lotion in the water for a better hold, I use mizani humidity resistant hairspray prior to inserting the rollers.
It's a matter of trail and error and what works best for you.