What should I use for DA unreachable parts of the car?

[puma1824]

I recently purchased the Meguiars DA Microfiber System 5" as well as 3" backing plate and MF disks. What should I use for DA unreachable parts of the car to complement this system?

Any suggestion for polish, wax, applicator(s) for these hard to reach by machine areas? I'm thinking maybe Meguiars 105 & 205. Example: inside of BMW M3 mirrors, door handle recessed section, and other hard to reach areas. (see pics)

Thanks in advance.