Here is a copy of the email they sent me when I asked the question !
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Hello Paul,
I believe the barrels at
http://www.oak-barrel.com/barrels_and_o ... arrels.htm could be
used for this purpose.
We have the following preparation instructions for wine. I assume
preparation for beer would be similar:
1.. Rinse the barrel several times with cold water.
2.. Half fill the barrel with hot water (60 to 70 deg C).
3.. If available add soda ash solution and mix.
4.. Completely fill with hot water and replace the bung.
5.. Allow the barrel to stand for 24 hours then rinse it several times with
cold water.
6.. Check the barrel for leaks. If there are any leaks then allow it to
stand for another 24 hours.
7.. Empty the water and fill IMMEDIATELY with wine or fill completely with
cold water for storage. In order to keep the barrel in good condition always
keep the barrel full with either wine or water. Check the liquid level
periodically and top up if necessary.
Kind Regards,
Philip Scott
http://www.oak-barrel.com