Tempered chocolate spheres in advance? I'm having a birthday party this weekend, and therefore I need to make some food for my guests. For dessert I want to make a chocolate sphere with some kind of stuff inside, and then pour it with caramel sauce.

In order to make the chocolate spheres I bought some half sphere chocolate moulds in polycarbonate. But the one I have only have room for 6 at a time, and I need to do 24.
So my question is, since I want the day of the birthday to be as stress less as possible, can I make these moulds in advance, while they still remain shiny (Of course only if my tempering is done correctly) and not the white spots, and if so, how should I store them, and can I do it 3 days in advance, or is 1 day advised ? :)

Basically: I need to make some tempered chocolate moulds, but I'm pretty sure I won't have the time to do all 24 the same day, since I will be having lots of other stuff to do as well. So can I do it in advance ? :)

Best regards
Chocolate will stay fresh for weeks or even months if stored correctly.
And yes, the spheres will stay as shiny and beautiful as you made them if you store them correctly:


in a cool, dark place away from sunlight 
but not necessarily in the fridge - taking them out will lead to condensation on the surface
at rather constant temperature 
and dry.


So in short:
A large enough foodsafe plastic container in a cool cellar or cupboard, away from (sun-)light and, if applicable, curious kids, pets or others that might feast on your stash in advance. Unless you have a high humidity environment, it's not absolutely necessary that the box be airtight. But if you want to be really sure, include some silica gel packs against excess humidity.

Do not stack them like nested bowls, or you could scratch or otherwise damage the glossy surface. If you have to, place one layer in your box, cover with parchment, foil or similar, add a sheet of cardboard for stability and another layer of parchment or foil, then the next layer of spheres. 

Good luck and have a good party!