for paint have a look at acrylic water based stuff
2 pack is bloody leathal an can be expensive upto £1000 a litre
go on some of the airbrush sites helmet /motorbike custom stuff
as with most things these days there appears to be less freebie stuff
on tinternet everyone wants their share.
as for guns a cheap big one (machine mart etc) for coverage
then a finer one (devillblis,badger etc) for the detail stuff
small airbrush comps are £70 upwards, but for a big gun you'll need a
bigger compressor (you should already have one anyway,makes fixing
punctures easier)
the thing to remember with painting stuff a lot of time goes into the prep
work ,cutting back ,base coating ,flatting out masking ,top coating,finishing
my mate chalky paints race bikes/cars in his spare time and i've picked up a bit from him ,but when someone asks how he can justify 2k to paint
a pug or similar and the paint costs a grand plus 80 hrs work in it
i see why he gets pissed off.
so your £25 for a 3 colour fade sounds like a bargain,just i would'nt
trust them to do a good job for that.
you can do a reasonable job with spray cans tho
just don't practise on your beloved trimble
http://www.airbrush.com/how-to-guide.aspx try this