Just thought I'd share this bit of video of my dog Elvis.
I'm not sure what he's sniffing for...
You may add details at this point, I like to do a pre-bake at around 250 degrees in my oven on a tin pan for about 15 minutes. Again depending on the thickness of your character, because small stuff will tend to burn of not monitored. Glass is ok too, just make sure it's not something you'll be eating off of in the future! Pre-bakes are good to make sure your sculpt doesn't crack because the center is fully cooked. That is dependant on the thickness of your sculpture. the thicker it is the more prebakes i recommend.
with alot of work and patience you get closer to what you desire your sculpt to look like. More to come!