Originally Posted by Quak
When its fresh is key. If its been in the barrel too long sweets won't touch it. Nor will any of the chem treatments. I have a theory and it could be totally bunk but here goes...


when the copper oxidizes the chemical makeup changes enough that the solvents stop working. Ive seen copper that nothing would touch.



It may be harder to clean out after it has layers of fouling deposited on top but I doubt that copper oxide is the culprit. The blue and green colors that come out on cleaning patches with solvent are from copper oxide, the solvents oxidize the copper.



A wise man is frequently humbled.