Could you scratch/etch the name on the plastic somehow??

Scratch/etch? Now that's a thought. Might work with solid color plastic. I used to have a wood burning tool years ago. I should look around and see if anything like that might work for engraving. Might be a nice way to get your name to stay on a cloths pin. :D

Great idea. Thanks for the thought!

There is a marker called Slick Writer that is permanent, like Sharpie ... but formulated for slick surfaces - It works great! I buy mine at the craft store.