I used to heat my garage with a propane tank top heater in the mornings and evenings. The temp cycling and the propane exhaust made the rust terrible. I switched to a natural gas furnace now and keep it warm 24/7. Indoor humidity this morning is 10%, outdoor 72%. No rust now. Keeping the heat steady so the steel doesn't get condensation on it.
+ 1 vote for fluid film and lps 3
+ 1 vote for fluid film and lps 3