yay another pycon!
in
Pyconia they have a thing called Gemstone fashion, where they mix crushed gem powder into their food to make them sparkle.
In ceramics there is a thing called slip that is just watered down clay, if you have a different coloured slip you could apply it to yourself and maybe make little designs and tattoos. you might still be a bit limited in your colour palette but its something.
Pycons feel pain just not as much as other people, being squished is more an annoyance to them then something that would kill them. Although If my character gets their arm cut off I tend to make it more psychologically damaging, since their form is tied to their sense of being. So she goes into a panic and can't function very well until she gets her arm back.
Pycons can totally make little pockets for themselves, they kind of just eat the item and it doesn't get digested because it isn't clay. When you want it out you just regurgitate it or how every you want to rationalize it. You can also make your little air pocket bigger so you can stay under water a bit longer.
pretty sure they can have piercings, or you could just sculpt piercings into them. I imagine the piercings would be uncomfortable at first but would then become part of their natural form.
there is a pycon players guide in the works
here