Biomaterials like mycelium and kombucha leather are oftentimes not water resistant and therefore need a coating. Biopolymers like beeswax or natural rubbers provide solutions, yet also fungi can give an interesting coating for biomaterials. How can designers apply these innovations, and how do you choose or develop a coating? Listen back to the stories of: Stephanie Rensink (Microbiologist and researcher at Xylotrade BV) & Ward Groutars (Designer and researcher from TU Delft, the Caradt institute and Hoekmine b.v.)