I am trying some stuff out for my first winter dio (still in the planning phase) and in one of my modeling books (The Modelmakers Handbook) I found a simple way to make icicles.
This is probably well known but I still want to share it with you all, since so many are working on a winter scene for the competition.
I tried it and I love the effect, the only difference I did was to put some very fine dots of silver (very small (used a needle tip) and just 2 or 3) on the icicle, before I added a final varnish coat on it, it just gives that extra sparkle.
I hope that you can use it.
(:-)