West system epoxy, cork dust, or wood dust powder gleaned from inside the bandsaw makes for good coating and spackle. Have used it many ways in creating and repairing decoys.
Did a deep clean of my small shop last summer. Tossed lots of cork crumble & fine dust, black, tan, life vest, sorry. Saved two coffee cans full just in case. Don't make as many cork decoys as in the past.
my 2 cents