I myself was a Carman-Mechanic at Amtrak-Chicago for a full 30 years. When I resigned, I was #1 on the roster, and had been for 6 solid years. I've done it all there, you name it, Air Brake, Releasing Trains from Union Station, Carpentry, Overhaul on PM Gangs, Rip Track, and Welding for 15 of those 30 years, Inspection, and accepting brand new rolling stock for the company (from manufacturers Such as Pullman, Amirail, Bombardier, Budd Corp, etc etc) Instruction teaching others, whether 100 degrees out, or -22 below Zero.
And I considered myself one of, if not the most versatile mechanics with 120+ mechanics under me when I quit in 2003, and came to the "Land Of Entrapment".
Every sort of passenger equipment known to man, heritage, Flatbed, Gondolas, Baggage Cars, Sleepers, Diners, and the oldies from every defunct railroad in the nation, the ultra modern high speed trainsets, superliner I and II, Private Owned Cars even worked, and performed tasks with the likes of JPL, and NASA, working trains that carried Presidents, and their families, and Presidential Candidates. Folks like Bill Hillary, and Chelsea, and others like Jimmy Carter, Michael Dukakis, etc. I started there as mechanic in 1973. The Private Car Georgia comes to mind, both Clinton, and Obama rode that Car, as well as Abe Lincoln.
We of course used Anti-Seize, as well as many Threadlockers on many Bolts-Nuts on a daily basis, but of course many of these Nuts were as big as a large man's fist, and larger, some like softballs, and Bolts the size of Hulk Hogan's Arm. Even so, the ever handy Blow Torch, Oxy-Acetelyne was needed to be called into play and heat stuff cherry red, 1" Impact Guns would get those puppies off.
If I do choose to use a Anti-Sieze, I'll use such very very sparingly.
Mark