I found a great photo of the back of the helmet.

https://www.google.se/search?q=doctor+who+orange+space+suit&prmd=isvn&tbm=isch&tbo=u&source=univ&fir=PiXSkqVeMV95tM%253A%252Cetn3dA6_3oZclM%252C_%253BvIuX5bquzJdcVM%253A%252CAtpGmJCmIxn2_M%252C_%253BGwY6xhYsxvbwGM%253A%252C6gOqg3a5VvdhzM%252C_%253B8xD-icdNaCqj_M%253A%252CR_w8iO7vYHf07M%252C_%253BWViV6HFwC3e3tM%253A%252CUnJvwkOA3iuhGM%252C_%253BNnNNxCDQNUhvLM%253A%252Cetn3dA6_3oZclM%252C_%253Bj-gZJ04qLHv1nM%253A%252CT3sI3TWCNURGYM%252C_%253BgmpcOYUNlMfOmM%253A%252CT3sI3TWCNURGYM%252C_%253BJlXJQzJpi4RX-M%253A%252Cetn3dA6_3oZclM%252C_%253BbXlX3VZffDkRwM%253A%252Cfa5TQkDlB8JoyM%252C_&usg=__ennWoeteFo4X4_SiOlf3yuN3VCU%3D&sa=X&ved=0ahUKEwi5_t_V6pfSAhWD3SwKHW5VDpUQ420IPA&biw=360&bih=559#imgdii=NjYvTH3GKjRPiM:&imgrc=_BeRbzBmsXXtaM:

Yesterday evening was a big day for the space suit. I made the two-layer neck ring and magnet bases.
, from scratch and all metal.

It needs a few more holes and then black paint. The weathering is easy as I'll just scratch and scuff the paint to show that it's actually all metal underneath.