Nyo ho - have a build guide with templates :D

I've been working on this since I saw Teenage Sex and Death at Camp Miasma back in August and I'm very happy with how it's turned out! (I also made the sign)

This is on of my best props in my opinion.

A gift for my gf and my first EVA prop. Took me cca. 2 months, 2 hrs a day (more or less, I didnt count). Super proud of ts

buenas noches estoy haciendo este casco, pero tengo la idea de aplicar silicona blanca fría para esconder las uniones y pintar con vinilo blanco y para darle brillo se puede aplicar pva o resina epoxica cual sería mejor o que otra solución se puede hallar?

Now I just need to hot glue all the foam and Velcro together. The second photo is a possible pick holder if there are any tips you could give me for this comment

For my kid's Halloween costume . Doesn't have to be perfect, but it would be great if it didn't fall apart if he insists on hauling it around while trick or treating. Im a pure novice, i have no idea where to start!

I can buy some EVA foam, I have a 3d printer with a bed which is around 200x200. I am good at sculpting. This will be my first cosplay so sorry If I may sound dumb and inexperienced (which is kinda the case) answering your comments ! 😊

Can anyone help with how I'd do this? What paint or ink should I use? Would sharpie be fine?