What can I use to cover a castle cake? Rolled fondant isn't going to work for this design because it is very detailed. I want some kind of paste that gives a smooth finish over all the details and which I can work into all the knooks and crannies, and which I can then paint over (with edible colouring). I've seen this done on youtube by a professional cake makers but it doesn't say what the material is they are using, it looks a bit like modelling clay and has a paste consistency.
I have an art background but this is the first time I've worked in cake before!
Any advice is welcome!