David's got it. If you used yellow glue, it will at least soften in warm soapy water. It's water-resistant, not waterproof. I just added boiling water every once in a while to whatever tub I used. I am going to be doing this a lot in the coming months as I rebuild the Portsmouth Branch on a limited budget. The "tool tray" from a 4-foot long storage chest will be great for straight track; a shallow under-bed storage bed will work for curved sections (mostly).
I bought a roll of the AMI stuff years ago and immediately hated it. I've used heat (cautiously), 91% isopropyl alcohol, and a very sharp scraper to remove similar materials that have gunked up furniture I've restored.
There's not much to rust on the switches--except the motors. I haven't found any softening of ties with mineral spirits. Acetone in abundance will make them brittle, but has no effect when I use it in track cleaning cars--i.e., sparingly.