Looking Beautiful. A little Rub N Buff and then a clear lacquer finish to give it a layered finished that will really show off how well you printed that.
This looks great. How did you orient the helmet on the bed? Upside down or right side up? What type of filament did you use?
These images may help. Printing the helmet upside down will help you save materials. This print was done Chris Zoh and he used clear PLA. He used a default setting in S3D. The support structures were easy to remove without marking any scratch to the surface.