I've just chopped my 2004 320cd coupe in for a 2010 black 325d E92. I would appreciate to help with wax or polish... On my previous 320 I just used autoglym super resin with the cheap wraps and just would like a bit of advice on what to use

polish and wax are two totally different things.

Car polish is a liquid applied to painted surfaces to eliminate scratches and dirt. It does this by containing abrasive elements that scrub the paint surface, actually removing a thin layer of the car's paint

wax is applied to add a protective layer on top of a car's paint and clear coat. This layer of wax adds shine to the car's appearance and protects the paint from the elements, causing water to bead up and slide off.

best thing is to wash the car, clay bar it then polish and wax it.

hope this helps