At the library on Wednesday, a group of us carved corks into stamps. I boiled the corks for 10 minutes before using an Xacto knife to cut the design. The resin corks are easily cut as is. They are much like using the soft cut instead of linoleum for blocks.
The only issue with the resin corks is that the hole from removing the cork from the bottle is not very forgiving and creates a bit of a bump in the middle of the design. My sunshine stamp ended up looking like little eyes! I like!!