I've been kicking this idea around since I first got here, but lots of people have been making amazing stuff...
Soooooo I didn't think I could make anything I'd be happy with.
Well I got some ideas and figured it was time to see what I could do.
Here is my start!!!
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I don't like the cat at all... It looks like crap, but I figure I can get it whipped into shape soon.
So from the looks of it you used super sculpey? And if those are PBT DSA caps you used as the base, then you can cook the sculpey at a lower heat (just north of 200 degrees works very well for this size). That makes the mold making process a bit easier because you don't have to worry about deformation.
Apart from that I would try to smooth out the cats glasses a bit to sit closer to the face, otherwise the silicone that would be between the two pieces will eventually tear out when you try to demold it.
They are great looking caps, and I wish you the best of luck in the crazy world of casting!