I have a autoimmune PN and I have terrible circulation, but, my circulation problems (reynauds) are part of my antiphospholipid syndrome, while the neuropathy is part of my lupus, so they are not really connected. Also, the pain of each condition is different, so I am able to tell whether the pain is associated with my reynauds or my PN.

Although I frequently have very cold feet (red/blue/purple or waxy white in colour) I have never really been bothered by them being cold, I really don't notice it. I have no clues why, but that's how it has always been with my reynauds. With reynauds, the skin always go through a series of colours as well as just feeling cold to the touch.

I am a little puzzled by the white spots on your arms - I have poor capilliary refill, but only get the white spots when my skin is poked with a finger to test my refill. I take longer than normal to refill, but the normal colour does return. I don't have spots that stay white all the time - if you do, I would enquire further into this.
hth
raglet