SSB,
I wouldn't try to polish the Future, there should be no need as the stuff settles down (most of the time) to a perfect gloss, although I've acheived excellent results polishing Future using Brasso paste (believe it or not) applied with bits of an old flannel shirt.
There are quite a few other products I use to get perfect results - after a careful rub with 2000 wet or dry (wet) I use Meguiars car polishes and waxes - they're expensive, but a bottle will last half of forever because you only need tiny amounts. Sometimes it's best to wait a few days after sanding to allow the paint to harden again, cuz with sanding, you break a sealed surface to allow additional undissolved thinners to evaporate out of the interior surface of the paint.
Again, I use flannel material, rubbing carefully to avoid edges and high spots (don't want to cut through the paint to the primer) and just keep rubbing till I get a mirror finish, then a wax coat to get rid of the few swirl marks.
To get polish out of door panel lines, suck on a toothpick for a few seconds to soften the wood, and use it to carefully scrape the polish from the panel line. You shouldn't end up scraping the paint using this method.
I've heard many on this forum swear by the various polishing kits like LMG and the like. I understand they're extremely effective, but I've never used them. I've also seen articles on their use in FSM, and the results are as good as anything I can get using polish all by itself.
Cheers,
LeeTree