You can paint the wood before or after.  I'm doing it before.  I'm using 3mm basswood for the back of the keyring and have painted it with black acrylic paint.  For the strawberry I'm using 2mm basswood and painting the berry red and the top green.  You can use 3mm for the whole project, I just wanted to cut down on the bulk.

Bring the file into Creative Space.  Place the Black painted wood onto the honeycomb and cut the back of the keychain.  Place the Red and Green painted wood onto the honeycomb and cut the berry and top of the strawberry,

Using wood glue place a small amount on the back of the berry and the top and glue to the base.  Once completely dry had the metal hardware for the keychain.