Decoupage would surely be unhygenic, wouldn't it?
I remember seeing on instructables this how-to on creating a lightup magnetic picture on your fridge that you could swap around and change pictures with it. I thought about doing that, but I couldn't be bothered, and thought maybe a plainer fridge would look better.
How about you give us more of an idea of what to do, by posting a photo of your fridge and the kitchen? Then we can see what colours/look would go in the kitchen.
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I've left WP.