Portal Cable is a must, as well as patience. I was a local concours winner for years with my 911s, before I got into tracking. More fun to drive, than polish, but I'm still very anal about keeping my cars clean and enjoy it. Always said I'd never buy another black P-Car, but come home with another, time after time (and some other colors). Many great products and everyone has their favorite, so I'm not going there.
A few of my examples over recent years...
__________________ JGM
2002 Boxster S
1973 911 Green FrankenMeanie
PCA DE Instructor circa '95