It's from halfords?

No then but they should have a chart that suggests what colour primer and if laquer is required

their paint isnt great, if its outta can off the shelf, can be ok, mixed paint though....i didnt like

go to a local paint shop/supplier (on trade estates) and get them to do one, or get off the net.

as demonufo said before, good cans, with a good nozzle make all the difference.

The mix to match stuff is pants but off the shelf is ok, try and find a decent specialist there are loads around