Bearing faces? Most bikes have sealed bearings these days, so there's no need to overhaul your bearings after riding in the rain. The chain and cogs need some cleaning and lube, but modern dry chain lube also makes that much less onerous.
Just because bearings are sealed doesn't mean debris can't get inside of them. This is particularly a problem for bottom brackets bearings since they are so large (more area for stuff to sneak in) and because it is easy to force material inside of them when spraying a bike off with water.
There are certain bicycles that use partially enclosed chains and sprockets for which chain maintenance is greatly reduced.