if you dont see it as a problem then no... you dont need to.

when a machine polisher you might find that the polish compound leaves the trim it touches with white marks and the badges on the car are likely to tear the pads so they would ideally be taped up as well...

here's a car i did last summer for my boss...

DSCF0333.jpg


DSCF0335.jpg


the white mark in the door on the bottom left is a reflection of polish i spilt on the floor...
 
A machine polisher is a machine polisher, they all do the same job. I'm a mobile valeter and I have used the same cheap one for the past 5 years and its fine. Its all about technique when it comes to a quality machine polishing.

ive just brought a dynamic power polisher from fleabay was only £60 any tips on using this as never used one before?