EXACTLY what I've been doing for my toes. It helps. Up to 45 min. before the pain begins. However, my FINGERS still start to really hurt after 20 mins. I've put the toasti-hands in my gloves, and they help with the palm area, but do nothing for the fingers. As our water gets colder and colder, it gets worse and worse. I added a fleece liner under the other one and that helps (I tried one hand with, and one without) but I'm still in pain after 20 mins, and for 30 mins after the dive. I finally asked the Doc and he said I probably have some syndrome I can't pronounce that basically means, poor circulation. There are meds, but I don't car for the side effects. The Doc agrees.
Last week diving in the Puget Sound in warm 48 degree water it was great with the two liners. However, back here in 36 degrees the pain is back.
My wife went on line and found some battery heated glove liners ($50.00) that are really made for motorcycle riders and a 12 volt plug-in, but they also come with a battery pack for D sized batteries, so today we're going down to the local Harley shop to check 'em out. I'll keep you posted!
BTW, SB, as per your other post, hope you find one too! :approve_2