Congrats! I have a shiny 99 too! Then I have a messy one in the garage awaiting help to look purdy. Be careful with the alcohol. I use a towel over the bed and added piece of tin foil under the needle bar and presser foot area when using it. I don't use it with a toothbrush (it will spatter!) except for scrubbing on parts I have removed and have safely a goodly distance away from any sewing machine.
Kerosene is another choice for removing old oil. It is not as dangerous to the finish but takes more elbow grease.