Just FYI, a colleague of mine who is a window collision
specialist/researcher recommends 2-in spacing over 4-in.
On Mon, Sep 23, 2019 at 7:10 AM Kathy Leonard <[log in to unmask]>
> I found the marker mentioned at Amazon; it says it’s for glass:
> Uni Posca Marker PC-3M Paint Glass Pen Fine Bullet Tip 1.3mm White by uni
> Michaels has something similar that writes on glass, but it’s 1.5mm
> I haven’t looked into Sharpie.
Gretchen E. Nareff
Bennington, VT (soon-to-be)