I was wondering if it was possible to color MMF once it is on the cake? I am going to be making a cake with a metal finish and I didn't know if MMF would color the same. If anyone knows please let me know. TIA
You can 'paint' mmf, just like any other fondant. You need to use care not to get it too wet.
I strongly recommend you test your 'paint' on a scrap before you put it on your cake.