>using epoxy on some plastic
>two big flat surfaces. easy stuff
>sand and clean both surfaces
>warm both surfaces with a torch to remove any moisture
>apply epoxy to both surfaces
>cures like it should
>I go to use the now fixed part
>instantly falls apart
>epoxy has all the sanding marks molded into it, no air bubbles. It just didn't stick.
I forgot that real life is actually like and RPG and you can just roll a zero and lose for no reason.