Hi Debbie: Our previous homeowner somehow decided to paint the copper gutters and downspouts...guess metallic copper was uncool at one time.
What I did was use a heat gun and a paint scraper. The old oil paint bubbled up with the original primer and
came off quite easily. You don't want to hold the heat gun in one place too long or you will get these ugly discoloration marks...hold it on the paint just long enough to bubble up the paint. It proceeds a little slowly, but you just have to keep at it.