Hi all, firstly, sorry if this seems a silly question or is repeated. I am a decrepit old fogey returning to model trains after, nigh on, 58 years. I have recently started to build my first (and probably last) layout. The problem I have is, I am also new to soldering and through watch a myriad of tips via YouTube vids I have now become confused and somewhat anxious. I understand that to achieve good soldering outcomes I should use flux. Now, here is my concern. I have started to use Baker’s Fluid No. 3, which did improve my results BUT I have since seen a vid from a modeller and an article from DCC concepts which state that this product is very harmful to Nickel Silver tracks. Is this correct and if so, what is the most suitable flux to use. thanks in anticipation.