Thanks for the comments! I did the cars on different days, so it was OK -- time flies when doing this stuff!!
grmensz: my 330i paint is actually very very horrible, it spent ~ 3 months outdoors at it's stay getting fixed. Felt like sandpaper when I got it back

imo Clean dark-coloured cars look more amazing than an equivalent light-coloured car..
black can't be topped :shock:
a pic of my old ML