I used to use sunscreen on Buster's nose and around his eyes, but I cannot for the life of me remember what the brand was.
I also bought a dog hat (it looked like a baseball cap with ear holes) and it worked very well.
I've had good luck with the zinc oxide creams (including a variety of the baby diaper rash kind). I think it's great that there is a thread about this - I used to get laughed at for putting sunscreen on my school horses 15 years ago. Come to think of it, the same thing happens to the main character in my book - I guess being laughed at made more of an impression than I thought! :)
Ill be 100% honest with you.....although Im sure the nose masks work great, my horse is a complete dork without one, let alone with one. And if I pulled up to the barn and saw him with one, I think Id probably laugh myself to death.
But then again, whatever works right....:) again, hope I didnt offend anyone, just being honest