Poured fondant will give your cakes that melty look. I think that the frosting on those cakes are sweeter than what your MMF fondant will taste like. (gotta love processed sugar )Here is a link to ...
I don't think you have to worry about the wire being food safe. And as for sparkles on the end, I use beads from bead stores because you can find some really light ones that won't weigh down the cake ...