As promised, here's the tutorial of how I made the mask and beard to my Clopin cosplay.
This is now the second time I've made his mask and I've tried to cover any fiddly bits that might give you a bit of trouble. Learn from my mistakes!
This is by no means perfect. I have yet to find a way of attaching his beard that does not include peeling off a chunk of my skin to remove it, and I bruise the bridge of my nose if I wear the mask too long because the papier-mâché stiffens the plastic. However, it's a lot better than my first attempt and I'm quite pleased with it.
Hopefully this will help all you aspiring Clopin cosplayers.
Time taken: On-and-off this took me two days to finish (which explains the costume changes, spastic lighting, and random wet hair).
Clopin Trouillefou (C) Victor Hugo/Walt Disney's Hunchback of Notre Dame
NOTE: Please don't ask how I made the hat, because that is one part of the costume I really don't want to have to remake any time soon, nor would I endorse making it the way I did. For those curious it's felt sewn over a wire base that I spent hours painstakingly sculpting myself. It holds the shape well but as a result the crown is also incredibly uncomfortable and a tad too small for my head. If someone has a better way of achieving such a bizarrely-shaped hat then I'd be grateful for any tips!