Hi, i have zainoed our merc e500 almost a year ago, the color is obs black. i clayed it, and even today, the paint is very very smooth. yesterday, i decided to zaino my wrx for the first time. i used z-18, and not clay magic, since i had a bar at home. for some reason, the paint isnt as near as the mercs smoothness, and some areas are better then the next. i was wondering if its ok to clay my car today again, for the SECOND time in TWO days. also, do i have to wash again, or can i just wet the car, and apply my z-7 lube after, with my clay? also, if that does work, can i dry, then add 3 more coats, or do i need to wash with z-7? thanks a lot for your help guys, sorry about all the Q's. TIA!