Tpaul,

When you say, NXT i assume you mean tech wax? if so this shhould not be used at all in your process.
After the clay you want to be using a mild polish with a light cut such as AG SRP or Clearkot vanilla moose glaze. Then follow with RMG, EX-P and Nattys.

The Souveran is great especially for black cars but i know you'll be more than happy with the Nattys. I use Nattys myself and love it.. not only the finish but wait till you smell it.. bubblegum..mmmmm

As for rags, these are a big no no.

You want to be using all Microfibres, Use microfibre work towels/or applicators for putting on polish or products with cut.

Then you want to be using the small Meguiars style foam applicators for putting on glazes, sealants and waxes.

All of these should be uffed off using only megga plush microfibre cloths.

If you want to PM me Gaz and can supply you these now

Hope that helps

Frayz