How far in advanced can you make gumpaste decorations? I want to make letters (the 3-D curly standing up kind). I'd like to get those done ahead of time, but I don't want them to get too dry (can they?) and crack or get brittle.
I still have a fondant lamb I made in August hanging around in my kitchen for display. I looks just like it did the day I made it, (although it may have collected a little dust, and I wouldn't put in on a cake now). So in other words, a very long time.
Under the right conditions (not too humid or cold) gumpaste decorations last forever.
Gumpaste dries very hard, I believe rock solid is the expression, and should be hard to be able to create upstanding figures.
You can never start too early IMO, only too late. Especially thicker figures like figurines and letters take several days to weeks (depending on the gumpaste you use) to dry hard and firm.
A long time. I have three dogs on my windowsill in the kitchen from my daughter's 7th birthday and she's about to turn 8.