Do you have a high temperature iron or 70W iron? normally, you can put a lot of Tin on the wire and let the tin stay with the iron and the wire for quite a while, you will see the paint melt, Take away the old tin and apply the new tin on the wire. Alternatively, you can use a sand paper, sand the wire until you see the copper. I do not like this as this will damage the copper surface.If you still have trouble, pm me and I will call you.
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