This Pep build sat on my table for weeks....that's the problem when you are building too many things at once.......so how could I move it on???.....focus on it's "damage"......highlight those aspects as weathering and 'Street Judge' service use.
I estimate if I worked on it 8 hours a day and everything dried instantly, then about 3-4 days. But I actually worked on it a little bit every few days over a few months. I intended to finish it as per the movie helmet with the additional red layer and over the back additional layer. But I decided to not do that and weathered it as battle damage instead.
The cost was about $50 in materials and for something that starts out as paper, it's pretty cool.
The sanding is a real pain in the butt but an electric sander makes a huge difference. I rondoed the inside, but if I did it again I would add glass to the front sides.