Washing soda should be available where they sell laundry detergent,and aluminum sulfate is sold in home depot or any other garden center-it is used to treat soil for acid loving plants.
Just a note of intrest,washing soda is different than baking soda.
Washing soda is sodium carbonate.
Baking soda is sodium bi-carbonate.

Boco, I went through this method and got some tanning oil off of Amazon. I found that is gave the hide a very strong coconut scent. Although it wasn't entirely unpleasant, I'm wondering if I did something wrong. Have you tried the Hawaiian Tropic tanning oil?

I should have clarified-the tanning oil you need is what is known as "leather stuffing oil"It is called tanning oil also.It is sold thru Taxidermy supply outlets.
I think you got suntanning oil,lol.
Did it penetrate the fibres and make the leather soft?

LMFAO!!

Well I just spit my coffee out
But I can see where the confusion came from

Just messing around, when I googled "tanning oil" that is what popped up and it gave me a laugh, so I thought I'd pass it along. I just ordered the rest of the stuff and I'm going to give it a shot.

I am taking mine out of the tan today getting ready for the next step.

Isn’t neats foot oil used on leather ?

I never tried it,I heard you can use it.

I've tanned a few hides using this method and would like to go back and redo some hides I tried with another method (orange bottle). Is there any step I need to do to "remove" the old tan or could I start from the beginning?

Great HOW TO....post.