For the purposes of a scene I'm thinking about playing, I've been looking on Ebay for stage makeup pencils, suitable for writing on skin and washable (because something like eyeliner is probably a little too difficult to get off asfterwards).
And I came across a makeup pencil described as 'A soft, ultra creamy, colour concentrated formula used by professional make-up artists. Perfect for eyes, whiskers, freckles etc. Black.'
It was the next bit that got my attention.
'To get a sharp point, place the pencil in the freezer before sharpening.'
And then of course use it straight away... [evil grin]