It was easy to do, here's the "recipe":
1 cup Peroxide
1 cup Apple Cider Vinegar
2 Tablespoons of salt
Mix together in a glass jar, I used a quart jar. Stir, the salt may not all dissolve
right away but that's okay. Dump in your safety pins and leave them for 2 days. I stirred the mix about 3-4 times over the course of the 2 days. DO NOT put a lid on the jar. Yes, it smells so if you can leave it safely outdoors away from pets or somewhere else ventilated is best. After two days, drain out the ever so yucky fluid, I poured mine onto a nice big weed in my yard! I spread my pins out on a flat stone to dry outside but I guess you could put them on newspaper inside.....I've just not tried that so I don't know. Just know that whatever you put them on to dry, will be stained so be careful.
Use gloves, be careful, and last but not least, I'm not responsible for any "accidents" or mishaps you might have when rusting your own stuff!