Can stickers be made from melamine?

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We have tons of scrap cutoffs that get thrown away, and I have been saving them for stickers. I know they won't be durable, but they are free. I was just thinking, with the surface being water proof, would that encourage sticker stain?  I have some in a small stack of red oak air drying, so if no one knows the answer, I guess I will find out sooner or later.