Good job. Cleaning a bike like this shouldn't be a labor of love so to speak. Just a mild going over to sell it for a slightly higher price...let the new owner take the time they want to make it perfectly detailed. This is unless you intend on keeping it and riding it.
I see bikes like this all the time, and while they still function correctly, they were not that desirable as a collector piece. Same as with cars and other things of different vintages, the cleaner it is the more interest it will draw. I owned and drove a Mercury Comet for a couple years and it was clean as a whistle (old lady owned). It ran like a top! I sold it for what I paid for it after I was done driving it.
That being said, don't underestimate what something shiny will bring. Even though a Murray bike is just a plain Jane bike it can hold it's value if it's cleaned totally. Fresh tires, touch-up paint doesn't hurt the end result. I call a bike like this a "practice" tool. I can try different restoration techniques without worry about ruining it or it's re-sale value.