Try a different copper remover. I use Boretech Eliminator. The patches go blue when copper is present. KG12 is suppose to be the best, but I dont think it gives the colour change like Boretech
Try a different copper remover. I use Boretech Eliminator. The patches go blue when copper is present. KG12 is suppose to be the best, but I dont think it gives the colour change like Boretech
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