Snakepit Studios Marvel NOW! Deadpool: Faceshell resizing help - please!



My name is Jay and I've been a part of this community for awhile and I have enjoyed hours and hours of seeing the amazing talent on this site. I've made some friends and have learned quite a bit by being here, and I now need some help.

I purchased a Marvel NOW! Deadpool from Snakepit Studios. Let me say right off the bat that this is a fantastic suit! The communication throughout from questions to deciding to buy was fantastic. They really care at Snakepit and I highly recommend them if you're in the market for one of the costumes they do. The measurements you give get you a perfectly fitted suit, and the accessories are top notch.

My only problem is the faceshell. It's universal, so it has to fit a variety of head sizes, I'm not complaining at all. It is how it should be. I just need to figure out / get the courage to modify it. My hesitation is, if I screw it up, I'm SOL and won't be able to wear it unless I either somehow fix it or get a new one somewhere, and with money always being tight, my best option is to come here and ask (also my great friend Pandatrooper suggested I come here and ask) - so here I am!
It's a resin faceshell, so my options are to trim and sand little by little, unless you all have better ideas?

Thank you and I eagerly await replies!