Tim,
The others have given you good advice. In my experience, brass track (LGB and Aristo) has oxidized very quickly but shines up quickly, too. Personally, I have built 2 garden railroads using brass and one using stainless. The stainless is 99% less maintenance. If you are going on board battery power, then you can use just about anything for track.
If I remember correctly, that shay will go around a 5' diameter curve or tighter. It is a good idea, however, to plan your railroad with 8' diameter curves so you can run bigger equipment.
The others have given you good advice. In my experience, brass track (LGB and Aristo) has oxidized very quickly but shines up quickly, too. Personally, I have built 2 garden railroads using brass and one using stainless. The stainless is 99% less maintenance. If you are going on board battery power, then you can use just about anything for track.
If I remember correctly, that shay will go around a 5' diameter curve or tighter. It is a good idea, however, to plan your railroad with 8' diameter curves so you can run bigger equipment.