Paint or lacquer for marking kitchen items meat/dairy/pareve?

I need something to mark kitchen items meat/dairy/parave other than stickers (they come off too easily during washing & are too large for items like tongs or other utensils). I’m thinking of using nontoxic nail polish on an area that won’t be eaten off of may be the best idea, but am really open to any solution where I can just put a little red/blue/green dab on it to permanently mark the item. Any recommendations would be really appreciated, thanks!