Hah! Theres only about three things I can write about from experience and One of them is 303.
This is Youngs oil which is water miscible like a cutting oil for Use on lathes. The idea IS, that you mix it with water and it goes into a milky emulsion. Then use it on a patch and the water droplets in it pick up the water Soluble Salts from the corrosive primer will be absorbed away . So its a more civilised alternative to "poUr boiling water down the bareII" .
The Smell is nice, distinctive, quite different from Hoppes #9 Which is fruity.
I've only seen it in a bottle not a tin.
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