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Old April 11, 2013, 08:51 AM   #2
wachtelhund1
Senior Member
 
Join Date: January 4, 2007
Posts: 141
You fill the barrel with the copper out solution to use the Otis system. After the barrel is clean, you empty the barrel of the solution and then dry patch and patch with oil. I've been using the Otis foul out system for 30 years, not even sure if it cantains any ammonia, if so it is a very small ammount and will not hurt your brushes.
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