Tips for getting rust stains out of cotton?

[SaltyLemons]

Any ideas what I could use? Tiny dots of orange staining that I think is rust on a 100% cotton dressing gown. Will anything work? Thanks!

www.amazon.co.uk/Hg-Stain-Remover-Rust/

This worlds quite well, does sunshine and lemon juice apparently.

works*

Yes I was just about to buy that - might try the lemon juice first...