Old Cruiser I used a rotary polisher for years as well, in fact up to about a year ago.
I too was a non believer of the orbital thinking it was a toy but with newer pads and compounds you will be quite impressed.
Take a look at the below it was done with a compound in one step with an orbital polisher.
The above was done with a new compound and a microfiber pad to a last step ready, no holograms etc.
If you actually give it a shot you will be quite impressed.
Take a look at the complete write up.
Product Showcase: Menzerna Fast Gloss 400