How to get scratches out of copper and polish it

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I would first try to chemically clean the roof of your window. I used commercial cleaners like Tarn-x to remove the patina. I have also used a white vinegar and salt solution. Vinegar and salt works well on any kind of oxidation and can be used to force a patina, also.

I never bothered trying to remove pitting on outside copper trim on my house. I would just clean it and coat it with a clear coat or even linseed oil.

@dchomak

I don’t know what to tell ya, it ain’t easy.

I have a saying, “A true Professional will make a tough job look easy”

I thought I knew what I was doing when I started this, but I’m having a real tough time.

Normally, to polish scratches etc. out of something you would use successively finer and finer grades of sandpaper to remove the deeper scratches, then move on to ever finer grades of polish. Finish up with a buffing wheel.
In my case, being outside and working on 75 year old copper that has a deep layer of oxidation and pitting I have a lot of work ahead of me.
I happen to be working on this right now.