Hello Folks:
I know this is an older thread but I thought I'd add my thoughts, on my previous layout, which had a life of about seven years, I found that eventually I had to bond all the rail joints as the joiners themselves fill up with gunk and don't fully conduct, the gold plated Peco joiners were very good, bet they're not made any more! Spraying with a good switchcleaner periodically, Servisol is good, (not WD40 it's an oil), does help but the older the layout got I had to put more bonds in, a gas soldering iron is good for the work, and the wire can be pretty thin.
As regards t