I spoke to Joe about these very same issues at the UCP show and from what I can recall, for orange peel, you pretty much have to wet sand the finish then go through the polisher steps to remove it. Bear in mind that there are various grades of polisher bonnets as well as polishing medium to use. Going from only as coarse as necessary to the finest grades in steps will be necessary to get the results you want. Just be careful with a rotary polisher because you CAN damage the paint if you get over ambitious with it's use and application. Taking off the clear coat down to the base paint will probably really ruin your day for you.
If you don't already have one, you may want to consider getting a random orbital and trying that out first. It will likely get out most of the minor scratches and swirls for you with a whole lot risk of damage.
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