When I did mine, and previous show cars I've had, you need to be sure that you're using the right pad with the compound. I found this is the most important step as the wrong pad will either over work the compound or not work good at all.
I spent a few extra dollars and bought blue painters tape. I covered the edges of trim where it met the paint to keep compound out. It took a few minutes to install, but was worth the time saved in clean up.
Start with one panel, keep your DA on low speed to start, smear the compound around evenly, then up the speed to full, or just under full. Make overlapping passes horizontal, then go again vertical for full coverage. You only need to do this a few times in each direction, then wipe off. The swirls should now be gone, but you need to polish. Use a good polish and a polishing pad the same way you compounded, and the truck will glow.
If you're doing this much work, and can let the truck sit for 2 days after, I would finish with Avalon King ceramic coating. The color will pop, the blacks will be uber black and the swirl removal is maintained for longer than just waxing.
