jayjay - ok, that makes sense. As for the form, it's the typical government oversight stuff that Dupont has to provide reports on for statistics. Basically your info, what the intended use is, etc. I'm sure there is some govy pencil pusher who looks at them from time to time but 1-2 yards won't even put you on the radar. As for the wax question, there is the cuirbolli process of wax hardened leather for medieval armor but I don't know much more than pulling up articles on it. Some of the folks in the reenactment section may have more info. Here's one article: http://www.swordbrother.com/sca/hardleather/
Dirtclod does bring up a good point too. Most manufacturers won't say proof simply because there is always going to be that one thing that gets through. While a combination of treatments might stop a full bladed knife, they might not stop the slim point of an icepick (or shiv) from penetrating and therefore wouldn't be stab-proof in 100% of instances. Kevlar 29 isn't rated for stabbing due to the dispersion reasons dirtclod mentioned but is rated for ballistics. Kevlar 779 is the better 'personal use' fabric as it is made for correctional officer use (stab and low velocity projectiles) but available to the public. If you can find it, Kevlar 159 is actually rated as stab-resistant fabric, designed specifically for that purpose but harder to come by (the forms may get longer...LOL)