Long ago I use to do the same thing myself. Not if not out of surrender to nature but in how I was forced to keep my faced shaved in highschool (I went to christian school). I've heard from old machinists how a beard helps protect them when they don't want to wear the bulky face shields. I was still concenred just the same for fear of it catching on fire if one hot piece of metal stayed in the beard for far too long.
I'm not sure how my beard would look if I let it grow to long and if the multicolors would help or hinder things. It's bad enough I get ingrown hairs.