On my 2" pipe, I ziptied a couple of stainless steel scrubbers(or
other abrasive) to a dowel rod and it's just like cleaning a gun
barrel. The vinegar soak and some of the vinegar/salt/baking soda
paste does okay for me. There are commercial copper cleaning
chemicals in the housewares section of the grocery usually, it does
a good job, but rinse well.
--- In email@example.com, "Steve" <gufty4@y...> wrote:
> I have just finished my first wash and as of yet have not started
> still. I have gathered some second hand 1.5 inch copper tube for
> first attempt. I was wondering if anyone new of an easy way to
> out the green gunk from the inside. I would prefer a chemical
> as it seems to be quite tenacious.