RE: monkote wax?
Top Flite Monokote Cleaner Polish works very well. It's a lot like waxing. You just spray it on and wipe it around good like in a waxing motion. Switch to a clean dry paper towel and wipe to dry and buff. The dry paper towel will just float across the covering from being smooth and slippery. I really like it. Maybe there are other products as well others could chime in about.
[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXHZ37&P=7]Top Flite Monokote Cleaner Polish[/link]