Hand laying is not for everyone, I started with it 15 years ago and here is my take on a few things. I went with pressure treated wood for ties. My early experiments found that steel spikes would not only rust but would completely disappear in a couple of years so I had to use stainless steel spikes. Steel spikes would still “pop” on occasion, I have a photo somewhere showing some that did. I’m convinced that the grain orientation has some influence on this as I have had some that had never “popped”.
Due to the variable hardness of PT wood I found predrilling holes for spikes was a must and it is important that the holes be deeper than the length of the spike or the constant expansion and contraction of the wood will work on the point of the spike to push it out. And yes even the PT ties don’t last for ever, I’ve had to replace some after 10 years of service which I don’t think is all that bad. Most likely they came from the heart wood which gets the least amount of the chemical treatment during processing.
Two seasons ago I replaced a 15 year old section with ties milled from Trex. In the time since, through two Ohio winters and hot humid summers I have not had a single spike “pop”. In the future I will be using these for any replacement work and new construction. They seem to take stain well and blend right in with the other ties once they have weathered.
All of that said it’s my plan to finish most of the layout with plastic ties as there never seems to be enough time and at my current rate of progress I won’t live long enough to see it finished. I still plan to spike all of switches and any other special track work like dual gauge sections.
While I suspect many would see hand spiking as a drudge but I find it goes quick enough and it doesn’t require an extreme amount of attention, I find I can let my mind drift to other things and it makes spiking go quickly. I hand spiked in HO and found in large scale it’s so much easier.
While I intend to switch to plastic ties I have never really liked the looks of them and I’ve always considered track work to be part of the model. No matter how detailed your equipment is to me the effect is spoiled if you are running on toy like track. Just my 2 cents worth.