Nice job, that's a great looking coyote skull.
I know it may seem like some are jumping on you for boiling and not degreasing, but they are just trying to help. It's not too late to degrease the skull and as long as you didn't get it too hot while cleaning it you should be ok and still have a great looking skull for years and years. I use a 6 quart crock pot on the keep warm setting to degrease small skulls, it keeps it at just the right temp and cost me about $30. Drop the skull in with some hot water and dawn dish soap, enough to make the water soapy like doing dishes, then just keep an eye on the water level and add water as needed. Change the water out every few days until it stays clear, should take a month or three but your skulls will whiten a lot brighter white afterwards and stay looking great.