My heart grieves for you and your hubby. It sounds awful. I also love coconut oil and I've also heard of people using Vitamin E. Just buy the capsules and poke a hole and squeeze out the oil and smear it over his hands. They are both natural oils so won't harm his skin. Please let us know how the 2 of you are managing
Check out recent post by basketcase about her itching. Methotrexate is a tough drug.
Try using Coconut Oil. It works for me and I have rosacea, Coconut Oil has many known antioxidant properties.