I'm running low on Z7 (but well stocked in everything else with the Zaino name on it). I don't want to pay $7 plus the price of the Z7. I know that Sal suggests only using Z7 between coats of Zaino. I want to see if anyone out there regularly uses a non Zaino wash in conjunction with Z5/Z6/Z2pro. I hear a lot of good things about Meguiars Gold Class, and Eagle One Wet. From what I gather, the EOW will leave something behind that provides slickness (teflon?). I assume this is a no-no if you are plan on adding any more coats of Z2pro in the future (hard to stop layering!). What about Meguiars Gold Class? Just looking for some more cost effective over the counter solutions.