Originally Posted by
wheelreason
Facing and chasing a BB are two different things. As far as facing being required, what is required is to figure out if the faces are square and parallel, there are a few ways to do that, and most times they are GTG on most frames.
Typically a BB needs to be faced once, when new. Obviously if there is paint or damage to the faced surface, it should be done again but otherwise, no need.