Whilst dielectric grease is not a bad idea, perfectly ordinary high temp wheel grease will suffice if used sparingly.
I'd add the following to the list of "stuff" needed. A bottle of loctite RED, a can of dull aluminium paint and a can of semi flat black metal paint.
Why? You are going to tart up the starter, you may as well make it look pretty.
You will also need, in addition to standard hand tools, a impact driver with a spade bit that fits the big screws that hold the field coils in place, and a 5lb hammer for whaling on the impact driver with.
Many people omit removing and cleaning the field coils. This is a bad idea as they become the refuge of every piece of magnetic crud that is produced in the motor, or which finds its way inside. It is also a hell of a lt easier to solder in new brushes (if they are needed) with the coils out of the motor housing.
Do inspect the electrical pick-ups on the rotor and if they are in any way worn unevenly, or worn down to the epoxy that holds them in place - pack the lot up and take to an auto electrician for rehab.
Inspect and feel the bushes and if they are sloppy - replace them. They are standard BOSCH starter bushes and your auto electrician will have them, likewise the brushes if needed.
Wash everything clean and give the housing and the bendix exteriors a coat of the correct shade of paint. No body else will ever see it. But you will know.
