Jaycee,
Yes venetian turpentine is what they use to help prevent cracking and splitting of horses hooves.It's use in paint technology (artist's oilpaint) is to prevent 'sagging' of the oil on the canvas.It provides 'body' to your BLO concoction.You do need to heat up your concoction and simmer the ingredients to allow the infusion and structural change of the components.