Great ideas and methods so far.

Here's another idea I've been thinking about trying on a couple of "spike"s. I did this on my XD and it turned out nice.
If I tried this on scales I would either heat the scales in water or just smear the melted wax in without heating the scales. I still have the crayons and I'm thinking of possibly using a couple of coats of poly over the top to seal it in.

Coloring in your engravings: the Write Up - XDTalk Forums - Your HS2000/SA-XD Information Source!

If anybody has tried this or has a reason not to, please chime in.