The reference to Meguiar's no longer being recommended is due to suspicions that they contain silicone. It's perfectly possible to do the process using products which don't contain silicone - I've buffed a number of satin necks and head stocks on my Martins using Planet Waves 'Restore' Polish, followed by Lizard Spit.

Stew-Mac's Restoration Polish also comes recommended, but they can't ship outside North America.