Just be aware that the machine has the ability to mess your paint up, it is down to the operator to prevent it!
Don't lean on it, don't over do it, liberal paste of the correct cut, keep it wet at all times, check frequently and if you see primer you have gone WAY TOO FAR!
In all seriousness though, do use masking tape to protect badges and lenses etc. practice on the wife's car as it will get you brownie points and wont upset you when you **** it up!
Being into Self-flagellation , I much prefer to polish manually over a machine, you have far more control and get fit doing it. I tend to use Farclea G3 and 3M Fineness as they are more than adequate to deal with stuff you can do yourself. Oh yes, well worth claying first to remove contaminates.