I've high speed buffed vehicles for over 15 yrs and 4400+ cars. Knowing the correct speed , pressure and action is key. depending on the severity of your scratches, you can polish, glaze, compound, colorsand, etc... Make sure you look for pictures of the detailers work , before you trust them !!!
Some of my clients machine buffed cars:
Range Rover

2004 carrera type II
2006 Lamborghini Murcielago Spyder
2007 Ferrari 430
Here's a before and after shot

1990 Vector W8 ( 504 keith Black Hemi )
2005 Ferrari 360
'55 Chevy
H2 on 25's
2005 Porsche GT
