On Thu, 29 Jul 2010 21:58:47 +0000 (UTC), Andrew Barss
wrote:

Once annoyance is I often get chips or sawdust coming underneath the
visor, since it sits several inches away from my face.

I use a face shield and have reconciled myself to the fact that chips
may get under it. To deal with them, I wear a shirt with a high collar
(or use a towel under the neck) when I wear short sleeved shirts. I
also use a dust respirator just when I'm cutting.

I've tried out the full face shield you referred to and found that
sweat and the entirely closed face surface led to fogging up and
misting of the face shield even though it was not supposed to
experience those problems. It did however, prevent all dust from
bothering me.