Preventing rust in bolt heads I have several bikes and use them more and more in bad weather. I have no problem with rust on the chain, but I am seeing little bits of rust in the various hex bolt heads on the bike. What can I use to remove this rust and how can I prevent it from happening again. Note I ride things like Ragbrai, so keeping out of the rain, or drying the bike right away is not an option.
Where possible, replace with stainless fasteners. Things like water bottle bracket bolts are readily available in stainless at a good hardware store.

But most fasteners on a good quality bike are stainless to begin with, so it may be that you're not seeing "rust" per se but rather a sort of corrosion that can form on stainless.