Join Date: Aug 2005
Location: New Hampshire
Bikes: Gunnar Sport, Soma Double Cross Disc
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I'm not too familiar with Truvativ stuff, but if it's an external-bearing BB, then facing is a good idea, maybe even a requirement. If it's an internal, loose-ball BB, then it's also a good idea from what I've read.
If it's a cartridge BB, or a BB where the cups don't actually touch the faces, then it's less necessary. In the case where the cups don't touch the faces, I see no point in doing it unless and until you change over to a BB that needs it. Otherwise the facing is just going to take the paint off (if any) and it will start to rust.