Scrimshaw

My grandpa taught me and my sister how to scrimshaw today. He is an expert and used to sell his work to the maritime museum in Astoria. 
Pretty much all you do is use something sharp to scratch an image into a piece of buffed ivory, blot some ink over it, and wipe the ink off.
Here is mine (blurry because it's curved and I scanned it!) followed by some pictures off google images.