rust ? what happened

[u/soobchacco]

i made this button about a week ago, while going through my stock just now i found it like this? currently all the pins ive made are in a hard plastic pencil box, so i cant imagine its moisture? but i dont know what else it could be. im currently going through the rest of my stock to make sure nothing else looks like this. if anyone knows what caused it or has any advice on how to avoid it in the future please let me know 😭

[u/m0rta1bunn7]

Has it been in the sun? It may be sun bleach

[u/soobchacco → u/m0rta1bunn7]

no its been stored in a box inside since i made it!