Changes

* See also [https://barrelbuilders.com/wp-content/uploads/2015/02/Barrel-Maintenance-Repair-Manual.pdf Barrel Builders Barrel Maintenance Repair Manual, Section 2.3] (using SO2 for soaking more than 2 days).

* See also [http://www.vadaiwinebarrels.com/barrel-prep-instructions.html Vadai Barrel Prep Instructions] (using hot water for soaking 2 days).

===Cleaning===