Quote:
Originally Posted by
BlackMesa 
On the AS that Jeffrey gutted, the raw edge did not seem to be covered, as he made an especial point of the hairs jutting out:
from Jeffrey's blog
Would there be a reason NOT to cover the edge, eg adding bulk resulting in a visible bump (in case of the chest) or minor discomfort in the case of high armholes?
There was flannel covering it, but the main culprit is the quality of haircloth used, which was bad.
The hairs in good haircloth will have a crimp to them, which helps lock them into the weave. They will not move, and a bit of flannel or silesia is enough to cover the ends. These are hair fibers removed from good haircloth

These are fibers removed from the A&S chest piece

Because they are smooth, they slide through the warp and poke through. No amount of flannel will prevent them sticking out over time.