I recently acquired 2 old kits (Houseboat and Adams). While checking to see if they were intact, I noticed some mold on the edges of a few pieces. Should I use diluted bleach? In the past for mildew smelling pieces, I’ve wiped with Murphy’s and then dilute tea tree oil, rinsed, wrapped in plastic, and placed in the freezer. Worked well. But these are whole sheets of wood and I can see the mold. Advice?