Meguiars (I think it's #2) fine cut with a terry towel for application. Back and forth motions, not circles. Work it until it is almost gone (clear) and wipe immediately. Depending on how bad, you may have to step down to #1 medium, but the common rule is to use the product that is just adequate enough.

After that, you're going to want to use a polish that's lighter. I'd probably use #9 Swirl Mark Remover. Apply with a different terry towel, work the same as the #2, wipe immediately. Then follow up with a non-cleaning wax.