Update bioresin.md

docs/files/recipes/bioresin.md

@@ -95,7 +95,7 @@ Using a silicon mold: 7 days (or until it comes undone)
 
 **Post-processing**
 
-Store in a dry and ventilated room.
+Trim edges, or slice the slabs if you wish *before* the slab has completely dried and hardened. Store in a dry and ventilated room.
 
 **Further research needed on drying/curing/growth?**