possible , whats your technique?Haven't removed any noticeable amount of copper.
my sharp fingernails , then pure ethanol if i am to do more soldering otherwise i don't care as i'm not selling anythingWhat do you use to remove excess flux?
That would be where you are going wrong. Save your welder for car repairs and paint remover for decorating. Neither should go near electronics.the "paint removers" do not cause the copper to fall off - but when you next time solder with high temperature and try to make a firm connection between Cu and bad quality component lead by "rubbing" the solder to surfaces with the welder tip and the Cu is small area it might come off easier than just with excess temperature - i usually cover everything with solder in prior sometimes it's not enough to sucessful finish