I used to use a Richard Ward powder- a bit like brown/gold eyeshadow that was great but it seems not to exist now.
I tried a creamy wand (another brand) which was awful and sticky - like applying mascara to your hair. I only need it along my centre parting.
I have lowlights (darker than my own hair which is slightly grey in places).
I don't think the spray on stuff would work as my hair has lots of natural highlights in it anyway and I don't want a 'block of colour' on my parting.