I have the "P" as well...there's a reason they call it 'the horror'!
No idea if the beard will fly, but...
People with psoriasis respond differently to different treatments, but the thing that works like gangbusters for me is narrow-band UVB light-therapy treatment. It's a friggin' medical miracle. It's like a tanning booth but with special bulbs - it's called narrow-band UVB because it's the portion of the light-spectrum that psoriasis responds to.
After (at the worst) having over 50% percent of my body covered in the nasty plaques, six weeks of the light therapy cleared me up about 95%. Ask your derm doctor about the light-therapy!
You have to cover your face for the light-therapy treatments (one treatment is sort of like a day in the sun), so as far as your face goes, light therapy would only help a bit. For the spots on my face and ears I use Dovonex and triamcinolone acetonide, etc. etc.
After being on photo-therapy it's been night to day difference for me...couldn't afford it before working for UPS, but now I've got the UPS 'cadillac' health care plan...
I won't go on enbrel either - too many side-effects and I have an aversion to needles!
I'm sure you know all this, but:
Stress is a huge and definite factor which is difficult to control, especially being a driver for this nut-ball company.
Some other factors you can control: getting adequate and routine sleep, minimizing alcohol intake + smoking, minimizing animal fats in the diet, taking specific vitamin supplements, etc. Basically major boring ****e.
Good luck with it, I know it's a major pain. Right when I started driving at UPS (when I had bad psoriasis) I would wear long pants and long-sleeve shirts all summer, everyone thought I was nuts. One guy asked me, "what's wrong with you; what, are you covered in tattoos, it's 95 degrees out, put the shorts on man!!!"
LOL. Yah, I'm covered in some real nasty tattoos buddy...