I'm hoping a few of the professionals will chime in here. Due to health issues, my parents had to suddenly and unexpectedly leave their home and move in with my sister. The house was closed up and winterized when they left last year Sept. It's been a year since anyone lived in the house and mom wants to go back for a visit and to get some items she left behind. My aunt went into the house and discovered that over the summer, the humidity in the basement has caused mold/mildew to grow on many of my mother's antiques. (See photo)

I'm wondering if there is an easy way to clean/remove this without doing significant damage to the finish of the furniture. The piece shown is a Willett red cherry china cabinet. My sister and I are hoping the damage can be undone without mom learning about it as it would be another disaster on top of learning about and caring for Dad's multi-system atrophy.