Don, let me start again , these hides have been fleshed and salted for at least a year and stored in 5 gal. buckets with tite lids.
1. KOH is Potassium Hydroxide, it is lye and the same as wood ash just a lot cleaner, 4 oz of powder 10 gals of water and 2 hides soaked same as the ash treatment.
2. I try an scrape the way the hair lays grows. I try and be very methodical so as to not miss any grain. First I go from neck to spine about 6" wide then do the sides spine to belly. I believe you could grain any direction you want but seems a little easier to follow hair direction and stay orientated, Important part is to not miss any grain.
3.If you have a fresh hide and enough butt Yes you could first flesh it clean then turn it over and grain. Soaking in lye does 2 things, Helps remove protective mucus and swells the grain so you can see what you are removing. Water alone will slip hair.
I have a friend that does braintanning as a full time job, He will throw 4 hides in a barrel of water and the next day he flesh's and grains 2 and adds 2 more to the barrel, He told me he does about 300 hides a yr. Very systematic and makes it look easy. I have watched him soften 2 hides at a time with fans and woodstove for help drying and run out in between to keep and eye on 2 he is smoking. Hope this answers all your questions. Bob
Just got a fresh hide in today so I fleshed it an also ran a time check on this step 35 min. I believe if I would have done the skinning I would cut this time in half. They left lots of meat on this one but beggar's can, 't be to critical, Todays total 1 fleshed and 1 grained enough fun for one day. Bob