I have a client who is using real seashells for her cake (as opposed to any sugar or chocolate version). She would however, like the shells to have an irridescence/pearl to them.
I do have pearl lustre dust, but would that "stick" to real shells? (They seem too smooth?)
The spray paints are most likely unsafe for touching any foods, so I guess those are out.
How can I do this, but still make them safe for the cake? 
Hey, Antonia, you had your oven fixed!!!!! LOL
I guess that you could ask in craft stores if they carry non-toxic lacquers or hon-toxic acrylic spray cans .Then after pearlizing or painting the shell, spraying them should make them safe to be used in the cake.
Hope you find a solution.
Hey, is that safe to do, put real seashells on a cake? I'm not asking to be a troublemaker! I'm asking because as I and the other bridesmaids of an upcoming wedding contemplated the shower cake design, one of them suggested using real shells on the cake and I shot the idea down. Now I am thinking I may have overstepped my EXTREMELY limited knowledge on the topic. Confectionary decorations astound me but real shells would be soooo cute too. Do you have to do anything to them to make them food-safe, or is it a given that they're OK to use, as long as they're store bought? Would love to know this in case it comes up again in the future!!
The bride has soaked the shells overnight in a light bleaching wash (I think she used just a squirt of bleach to a bucket of warm water?) I can't think they could possibly be a problem after that treatment. They were store-bought, not directly from the ocean or anything.
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