Ok I'll come clean
My grandfather owned a leather shop in which I worked for some time. We mainly worked with higher end leather from tanneries which supplied companies like Coach, just to name one.
That being said, here's what I do when it comes to cleaning leather and my thoughts on it in general.
Leather is tough, as you all know, it can take quite a beating. Unless you purchase an insanely cheap leather jacket or suit, and providing you don't like to asphalt surf all that often it really doesn't need a whole lot of 'care'.
My recommendation, for whatever it's worth (not much I'm sure
), is to just use a terry cloth towel dampened with hot water. And occasionally (once/twice per year) hit it with some good leather conditioner *sparingly*. That's it. Your gear should look great for years to come, just stay on the bike! I have (should say had) a 3 year old Astars leather and that's all I did. Even after extensive riding in the country where you come home literally covered in bugs from head to toe, all I would do is take the "hot rag" to it. Sometimes a little elbow grease had to be used but my jacket looked brand new till the day it met it's demise.
Honda Polish is an excellent cleaner and I'm sure it's safe to use, but I never used it on my leather. I'd use it just about everywhere else though including the seats. There are more aggressive cleaning agents on the market for leather but those are best used for more severe staining, such as removing permanent marker etc.