... rails should join, and no matter what temperature setting I use on the iron and how long I wait, the solder won't melt. I am using 60/40 solder, but can't heat it up directly- I have to heat up the rail. And that doesn't seem to want to happen. I'm going to bed to be grumpy and will try again tomorrow. And hoping I will grow two extra hands during the night to help keep everything lined up. posted: 13 Nov 2015 23:13 from: Jubilee42 3033_131812_330000000.jpg posted: 14 Nov 2015 04:26 from: DerekStuart I had a fair bit of problem with soldering, but was helped by a good chap named Howard Bolton (often goes by the internet reference JFS- I think he's on this forum somewhere). To flow properly solder needs a match between solder, flux and temperature. It also needs the surfaces to be clean. Have you gone over the surface first with a burnishing brush or similar? Then use a flux- either liquid or paste- then choose a ...