random memory unlocked:

I picked up a piece of diamond plate from the middle of the road in highschool once, it was a weird shape and it caught my eye, a triangle shape like a ships sail. Trapezoidal.

years later my vehicle was broken into by breaking a small side window, and in that moment I realized I had a piece of scrap diamond plate the exact shape and size of that window.

I used industrial epoxy to glue it in place over the glass and left it like that for a decade (the window was basically ornamental anyway, useless for visibility).