is it possible for me to bake my croissants, then freeze them and just pop them into the oven for about 7 minutes@ 176*C and have them revived?

You can also freeze them unbaked and bake at 400 degrees F for f14-18 minuites

Yes!

I usually get 2 dozen butter croissants from Costco and freeze them to reheat and enjoy for the next couple of weeks. Here are the settings for my convection toaster oven: 300 F (149C) for 10-12 minutes. Reheated croissants are warm and crispy with a soft interior. It's my kid's favorite breakfast.