Sales Tax on Used Car Reconditioning?

[XDCX]

I was thinking about Sales Tax on Used Car Reconditioning the other day and wondered whether this question is clear cut in most states or whether there's some gray area?

Here are the scenarios:

Scenario 1: Dealership buys a set of tires from ABC Tire Company and plans to install the tires on a customer's car that's in the Service Department getting other repairs performed.

Scenario 2: Dealership buys a set of tires from ABC Tire Company and plans to install the tires on the Dealership's Parts Delivery Truck.

Scenario 3: Dealership buys a set of tires from ABC Tire Company and plans to install the tires on a Used Car that's in the Service Department getting other repairs performed to prepare the car for retail sale.

Scenario 4: Dealership buys soap, waxes and detail supplies from XYZ Detail Company and plans to use the products on a Used Cars that are going to be reconditioned to prepare them for retail sale.