You can see from the photos one of the 'halves' demolded. I stick the two halves together with a hot glue gun and then use super-sculpy to fill in the join between both sides. After a quick bake to set the sculpy I added small spines to represent the spores weapons.
The first pod is nearly finished. Just need to finish the basing and spray the whole thing with Matt varnish (Testors) to take the sheen away.