This will take out heavy swirls and scratches
http://optimumcarcare.com/optimum-hyper-compound.html
And then follow up with this to get rid of any marring left behind
http://optimumcarcare.com/optimumpolish.html
This stuff should only be used by a rotarty. Dont try to use it by hand or by a cheap random orbital buffer type thing.
If you want give me a pm, i can see what i can do with my portercable and polishes.