Impressive stuff. My favourite product for colouring was photographic inks, from the halcyon days when people would hand-tint black & white photos. Sadly, as nobody does this any more, they seem to have gone out of production, which I suppose saves my B/W comic collection from the ravages of my paintbrush, probably a good thing.
Three tubes of acrylic, eh? That's how you separate the great from the commonplace. Kudos, Mr Kennedy!