Scrape then repaint
Spray W-D 40 directly onto the rust allow to saturate 1 or 2 min. then scrub steel wool (triple ooo.) over the rust. once the the rust is gone spray a rust preventer over the spot or you may repaint it. +++ That will help, especially if you don't want to paint the item; but you can also buy rust-neutralisers that convert and stabilise the oxide to give a more reliable surface for protective over-painting.
it may be rust.
I suppose that the recommended solution is to send this cylinder to metal scrap.
Acid resistant and does not rust and is installed by only professionals and lead lasts and lasts and very easy to repair
Scrape then repaint
There is no rust remover that going to repair the rust that has accumulated on a car for that long. It will be best to have the floor repaired by a professional.
No
Stacey David's GearZ - 2007 Rust Repair 2-1 was released on: USA: January 2009
MuscleCar - 2001 1970 Camaro Rust Repair and Engine Teardown was released on: USA: March 2011
the shops
I didn't know that there were swimming metal walls.
you can learn how at the attached link.
The first step is to remove the rust. If you check your machinery frequently you can catch it when the rust spots are small and easier to repair. Some people sand the rust off. You need to get down to where there is no paint or rust seen. It is important to then use a rust dissolving solvent to take off any remaining particles of rust. Make sure you clean off any dust left behind. The area must be painted afterward to prevent rusting. There is a process of welding that uses metal to repair. It is a more expensive, but is supposed to last longer. With farm machinery that is especially important. Here is a link to that product. http://www.rustbusters.com/index.html They say they can fix anything made of steel.
Spray W-D 40 directly onto the rust allow to saturate 1 or 2 min. then scrub steel wool (triple ooo.) over the rust. once the the rust is gone spray a rust preventer over the spot or you may repaint it. +++ That will help, especially if you don't want to paint the item; but you can also buy rust-neutralisers that convert and stabilise the oxide to give a more reliable surface for protective over-painting.
1. cut the rust out maybe a inch more than the rust. 2.weld or fiberglass medal to the hole 3.bondo and finish with puddy. 4.sand smoothly and primer it
Someone has manufactured a tool that reams out spa fittings. You may have rust from your heater blocking the orifice.