Wait, this was serious? Awfully risky/costly experiment. Quality tech fabrics are not known for puncture tolerance. But what if it were backed by a more stout fabric? A rectangle of Cuban Fiber, Silnylon or Tyvek in descending order in both cost and durability... would be your best bet IMHO.
I usually just chuck everything into the washer post race and deal with the consequences later since my stuff stinks so bad. Numbers and Jersey come through fine, just go inside out. The lettering does get noticeably more dull on the cheap race numbers. With cloth, you'd be all set.
I had my number glued on at caffeinated and I messed it up a bit and had to have @MadisonDan add a few pins. Long story short, it ended up in my wash like that. No issues at all. Maybe the glue held it tight so the pins didn’t pull at the fabric. When it came out the glue was still holding up.
@mbruno yes, you can glue. I have been this year and dig it. It leaves a little residue though and although it can be removed with some wd40, that shit stinks and I’m looking for an alternative solution. Maybe goof off?