Yes they are soldered on...soft solder. Yes, if you can torch solder skillfully then you could do the repair. Acceptable alternative repair methods?...IMO no. Temporary fixes that will be a PITA to undo or take time to clean away for a proper fix yes, many. Will you damage the lacquer? Probably a bit, minimally if your solder skills are good. If your skills are not good then not only could laquer be damaged, you can heat it enough to detach other parts, burn lacquer and possibly crystalize the soft solder so that fixing your mistake will be costly.