Ryan,
Eating through paint? You must have been using a machine buffer, not an orbital. Go to Autopia to have ALL you questions answered. It is to detailers, what the VCA website is to Viper owners. According to the experts, an orbital 'should not' be able to generate enough heat to damage of wear away paint. Now a machine buffer (spins in a perfect circle), can generate a lot of heat. Machine buffers should be left to the professionals.
Later
P.S. - It is a given at Autopia that the Porter Cable model 7336SP is the best orbital buffer. And I will save you time by telling you Lowe's has the best deal, at $109 bucks. You then will have to purchase pads. Click here
http://www.properautocare.com/porcabackit.html for another $60. $170 bucks and your on the way to perfection. You'll have to decide for yourself on polishes. Many different opinions on the Autopia website.
P.S.S. - OK, here are my steps: 1. Wash entire car with soap (Dawn dishwashing liquid) and water. This removes any old waxes. 2. Clay bar until surface is perfectly smooth. 3. 3M Swirl Mark Remover until surface is swirl free. 4. Dawn wash again, and inspect make sure swirl free. 5. Go through the Zaino process, and keep car looking perfect with occasional Zaino coats.
These step will take the better part of your Saturday, but after that your car will only need 1 coat of Zaino when needed. On a side note, the key to this process is the clay and 3M SMR. Once the car is smooth and swirl free, you can apply many different polished/waxes depending on your personal tastes. (Refer to Autopia).
Hope this helps.... Oh yeah, Zaino can be applied by hand or orbital. Not much difference. But the 3M SMR is MUCH more effective with the orbital, and way faster.