1. can I put the gum paste flowers on the cake with buttercream icing, or will the flowers break down?
2. can it be refrigerated overnight with the flowers on it once they are dry?
3. once the flowers are dry, can I paint inside the flowers with gel icing colours, or will the colours run?
As far as refrigerating, it depends on the length of time and the refrigerator. Give a couple of flowers a test run. I have placed them on my buttercream cakes and in the fridge overnight without problems.
Yes you can paint with gel colors but they will take awhile to dry. As long as you don't get them so wet that they have time to melt you should be ok.
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