here is an completed project of my fathers classic car etched on a beer mug. I used the sandblasting etching process but you could also use cream to etch it. wont look as good though. As me any questions about how to etch glass, I enjoy talking about it and I wrote the ebook: Glass Etching Secrets. Comments, let me know what you think!
Sorry I forgot to show you the other etching work here: glassetchingsecrets.com/etched_glass.html. Most of them are sandblast etching like the one in the photo. When I get the camera working again, I'll post more.