Rust on Onions and Garlic

Hi all,

I just noticed the first signs of rust on my onions and garlic yesterday.  Is there anything I can do to stop it spreading?

A real pain, rust!

I have some on my radar onions, but so far my pink roscoff onions - my very favourite onion - are ok.

Thanks folks, will try the gin and the vaseline - need to keep the garlic in a while longer, there are nice sized bulbs on them but they haven't split into cloves yet.