Hey bell I love that you are going to tan the hide of that big thing but salt (looks like what you have on it) will not do a very good job of tanning a snake skin (will get very hard). Wash that salt off fast and get a qt mason jar and roll the hide up and put in jar. Add 2 parts antifreeze (like you put in the radiator of truck) and 1 part glycerin oil (you can find it at the drug store) to the jar with skin, put lid on and store in the fridge for two weeks. Then spread out on a board (don't nail down)and take a spoon a lightly rub the meat and scales off both sides of skin, then brush the solution from jar on both sides of skin (leave on board overnight to dry). Repeat this every day for 1 week. In three weeks you will have a nice skin that will be soft and pliable that you can make into a hat band or belt (maybe both as big as it is). I have done this recipe on several big rattlers and it turned out great.