I have Reynaud's too. You don't want to know the official diagnostic test protocol was 20 years ago, BTW.
I was many years on calcium-channel blockers. It helped a little, but not much. I quit them several years ago. Amazingly, since I started cycling, I've seen a tremendous decrease in symptoms. It's almost to the point where I think I'm about average. I still have problems sitting in cool rooms, but out on the bike, I no longer have any issues--at least down to the single-digits (F), or minus double-digits (C).
One thing I always look for in cycling outerwear is wind-blocking. I have wind-front gloves, wind-front tights and my jacket is wind-blocking. Below freezing I double-glove, wearing long-fingered summer-weight cycling gloves inside a larger than usual pair of wind-front cycling gloves. I also use winter cycling boots below freezing.
Another thing I had to learn was to relax my death grip on the bars. That causes vasoconstriction. It's much easier to keep my hands warm with a nice, loose, relaxed grip.
It took me a couple of winters to get over my knee-jerk reaction to cold by bundling up. Doing that always caused me to sweat through my layers. That's when the real cold sets in.
Good points!!! I agree with pretty much all your input. When shopping for gloves I blow into them while on my hand. If I feel my breath/heat through them I won't buy 'em. For hands I like the big mountaineering mittens with an outer shell when it gets in the 20s F and below. I use Lake MXZ 300 boots two sizes too big and use two to three layers of socks inside. I don't do too much clothing on the torso, no more than anyone else, and less than some to avoid the sweat and wet clothing issue. I concentrate on feet, hands, and head.
Nicotene makes the problem worse, alcohol and exercise are supposed to help. So, we need to quit smoking and run from one bar to the next. :-) Or, we could ride to the pub in the next town...