swyman wrote:Wow these responses were not expected? Rob, that's what I was looking for. Just trying to decide what would be the best rust preventer....oil, WD40, or this stuff I bought to undercoat my new truck called Fluid Film? Surely not going to spend all that money to heat my hot water and if the boiler cannot take being shut off during the summer months then it is not very well made! It will get a very thorough cleaning and treatment of some kind, just have to figure out which is best.
Use undiluted Fluid Film for the boilers firebox and ash pit door AFTER you clean them.
Ideally using compressed air with an extension wand nozzle and a shop vac hose near the
nozzle to vacuum the soot off the boiler walls.
ideally if you have an Onieda Air dust deputy you can use a bit of water in it to catch the soot
before it enters the shop vac so you have a high HG pressure gradient to remove the soot as
you break it away from the walls of the boiler.
FYI they do the same thing at power plants except for the using vacuum as
they let the soot fall into the wet sump of the boiler where it is pumped
out to the ash dryer.
You can always use a square chimney brush too along with the shop vac
and Dust Deputy in the flue breech to vacuum the soot up as you break
the bond of the soot to the boilers firebox walls.
If you have big enough air compressor and air wand I would do that first as
long as you have goggles and a dust mask 3M model 93 are the best-if you do
not have a breathing air supply unit that you use for painting.
Using a small Pelonis space heater on low will work well to keep the firebox warm
after you spray on the Fluid Film and let it dry before you put the heater in the fire box.
The heater has a thermostat control so it will not be on all the time either.