Several years ago mice or squirrels chewed up a couple of sails stored in my garage. Fortunately, they were old sails.

TSP is probably the way to go to remove mildew. I tried some stronger anti-mildew spray and almost asphyxiated myself in the confined space of the cabin.

V-berth cushions, IMO, are best left stored in a dry place at home and brought to the boat only for the occasional cruise. I've never had to clean mine in 18 years which indicates how little cruising I do.