Black laquer paint, allowed to dry, followed with a cloth damp with a
Better to wipe a little paint off at a time than to try to get it all
and end up starting over.
There are crayons available for this purpose too. Simply rub them into
the markings, then wipe away any extra, going across the lines rather
than with them.
I've used magic marker as a quick fix. It does not hold up on the
surfaces, but is protected in the grooves.
Go to an engraver with a little plastic bottle and ask him for a donnation
of special laquer. Maybe some beer can ease the exchange.
They have that stuff: <www.grafograph.com>. But you'll never use it up.
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