Autoglym or Zymol

i use my dads autoglym collection (free, hey im a student aka pikey). tcut, resin wax, and the super resin stuff too... all cool. will check out the zymol stuff as they bummed it in the bmw club mag a couple of issues ago. i agree the white residue is annoying but i found you only get that if you leave it too long and "too long" is a short amount of time on a hot day.  and if i get it on the plastic i use the autoglym bumper care to sort that out which by the way brings up any colour plastic mint, and if you use it generously it lasts a while... although that would be more helpful on a vauxhall forum, since 80 vauxhalls had that plastic that started life grey, then 5 mins in sunlight went to that god awful primer grey colour we see nowadays.

thinking about the natural VS. petruleum distillates thing, i see what our silver birch tree does to moms car...... i would use natural stuff for natural thing and since paint is derived from petruleum distillates i would use them on it rather than the zymol stuff..... less work too im a lazy bugger (student habits)