I do not claim to be an expert on the subject but will give you my process. I lay out a fresh hide on the ground. If the hide is not fresh, soak it in water until it is pliable. I then start in the middle of the hide and cut a strap about an inch and a quarter wide. I use a utility knife that I change the blade in about three times per hide. Once the strap is cut, I stretch it between two posts. Pull as tight as possible and then take a rope in the middle and pull to a post of anything to one side to get more stretch out if the strap.
Then I take my pocket knife, sharpen it and use it to scrape the hair off. Careful not to cut the scarf skin that holds the hair to the skin as this is where much of the strength is. There is no bad smell, only takes about an hour to scrape a strap that is over 100 feet long.
This may seem like a lot of work but the rawhide has a lot of life and works great. I have only used this method so I do not know how it compares to using lime to make the hair slip. In that process,, you are basically waiting for the epidermis to rot so the hair falls off.
In case you are wondering, look in the Bruce Grant books for a Mary Fields from Bonanza, Oregon. She is in his books making a reata. When I met her she had made 90 reatas. She taught me her way of making rawhide. Told me she could show me all the mistakes. Honestly, I have not tried any other way of working rawhide.
I hope this helps.
Via con Dios,
Joe