I was just wondering if I can put a cake in the fridge that I have air brushed?

Its covered in MMF and air brushed black,

Thanks for any tips/advice!

You are going to have condensation issues when the cake comes back to room temp.

I did this a few weeks ago on a very warm day and the cake got kind of sticky and I had to be careful not to smudge it. It was really hot though, in the 90s. After it sat out in its box for a bit, it was not as sticky, but it would tint your fingers if you touched it. Its better to airbrush and let it sit out to dry. I wish that someone would develop a clear top coat glaze that sealed your airbrush colors in or something.