Another picture-less update:
I found my phone, but then there was work and the 'Oh my god, we leave tomorrow morning' panic of finishing up things. No pictures. I'll have quite a few after the con, though.
So, I'm trying a new material for the emblem. Task 16, by SmoothOn. It's a Urethane Rubber that looks to be pretty amazing. It's fairly rigid but also flexible. Sounded like a pretty good idea for an emblem on a leather chest piece.
It claims a 90 minute de-mold time, with a 6 minute pot life. I spent a good 3 minutes stirring just to be sure it was done right. I poured it about 4 hours ago and it still isn't ready to be demolded. It is *much* firmer than it was to start with, but it's still a little tacky, and I don't want to ruin my pull. So, looks like it's going to sit in the mold overnight.
Nothing quite like painting the day you leave for a con...and if this doesn't work, I'll just pour it in resin in the hotel.
ETA: Still sticky after an overnight. I've stripped the material out of the mold and I'm now baking it in the oven to get the last of the material to hopefully set so I can pour a resin one in the hotel.