Short answer, you can... Nothing and no one is going to stop you, except you'll be doing it at the risk of burning your clear coat.
FLEX PE8 Kompakt Rotary Polisher, motorcycle polisher
- The FLEX PE8 Kompakt Rotary Polisher is a purpose-built polisher designed specifically for small, intricate body panels.
- Designed for use with pads ranging from 1 to 3 inches in diameter.
Your asking if you can use a PBM (Purpose Built Machine) to do something other than it's intended design. The problem lies in the fact that it's a direct drive rotary style tool which is not dual action. The second problem is the heads are only designed for 1 to 3" pads, the smaller the pad, the more heat you will generate.
If you have a DA (PC 7424) that is what you will use for the majority of the vehicle. Preferably 5.5" Pads with a 5" backing plate. Switch to a 3" backing plate and use 4" pads for the tight areas. I have a three DA's, GG15 and PC's, and one of the PC's has a 3" backing plate for the smaller tight spots, I use the GG G15 on the majority of the vehicle.
My suggestion is to pick up Mike Phillips book "Complete Guide to a Show Car Shine". He dedicates several sections (chapters) to DA, comparing various DA's, backing plates etc... to Rotary with various pad combinations and how to use them all. Mike Phillips Detailing Books 3 Pack