Mold dust on orange for orange marmalade?

I had one orange go very bad with green dusty mold with my other oranges. The others are all firm and perfectly fine but had some dust on them from the bad one which I rinsed off. Can I still use them for marmalade? I would scrub with vinegar first but I’m not sure if it would be safe since the dust sat on their peels which go in.. any advice?