I've been usin meguiars gold class for a while now, i get really good results from it in my opinion anyway, the car stays nice and smooth for at least a month or so... Do u guys think I should suck it up and buy some Zaino, would i notice a difference? I haven't used a clay bar either... is it very difficult... noticable results? Also i'm reading that some of u guys put multiple layers of Z5 on, do multiple layers make a differnece over a single layer? thanx in advance. peace