So, this is my first post in a long time. I've been making Halo stuff since Halo: Reach was dropped way back in 2011. The picture u have attached is a collage of my very first Mark VI helmet. I knew close to nothing when I made this and it shows. I gave that helmet the most rudimentary sanding. The other helmet is the same Mark as the first, however I spent much more time sanding because I had picked up tips and tricks and knowledge on how to do things more efficiently. I guess the "moral" of this story is don't get too discouraged with early mishaps. Just keep chugging along and you'll get there.