I carve the pumpkin, and it looks good for about two days before withering.
Lightly bake it after carving maybe? (what temperature and how many minutes?)
Is there a way I can soak it in some preservative like formaldehyde without starting the Great Fire of London?
Easiest things is to wash/disinfect the surface before you carve, like give the pumpkin a nice bleachwater bath. Use clean tools & seal the cut edges with petrolium jelly or WD-40.
Long-term you probably could dry it as a gourd to preserve it, but it’ll shrivel up a lot and look like shit.
Formaldehyde/pickling would also probably work, but i imagine it’d get all mushy.
Freeze them
Just this year I learnt you should carve out the top (stem) part. Apparently there’s some nutrients/water, magic, or something, left in it; and if you leave it uncut it will help the rest of the pumpkin look better for longer.
Cut out the bottom, or a hole in the back, instead.
Spray with that Scotchguard stuff you waterproof shoes with. Seals the mold out.
Interesting idea
without starting the Great Fire of London?
Thanks a lot, i really needed that chuckle.
Now, basically we need to dry them. We can either drown them in varnish, or burn the insides but it wont be as effective.