This might be a little better at weed killing, and other tasks you need done on the railway line
Actually used on the NH Cog Railroad to melt ice off the cog. Probably could be easily narrow gauged.
The State of NH uses a vendor with a high rail tanker and weed killer on its lines.
The C&TS filled one MOW tank car and set up spray nozzzles to remove weeds if I remember an earlier thread. They damaged the spreader removing trees encroching on the ROW one spring because of the fire danger shutdown.
Bob Meckley