After the rust is loose you can scrub it off.
How to remove surface rust from sheet metal.
Apply a solution of hydrogen peroxide vinegar and salt.
However if the rust stains are only affecting the surface of the paint you can probably scrub it off with a cloth and some liquid detergent or a vinegar and baking soda paste.
The easy and safe way to remove rust at home.
The rust removal process opens up the bare metal surface and it will re rust quickly in the presence of any moisture.
Power brush the rusted areas with the wire brush on the power drill to remove the loose rust and flakes from the sheet metal.
They re harsh chemicals that give off some pretty intense fumes so suit up with rubber gloves goggles and a respirator.
However badly rusted metal areas need more prep work and possibly a special primer.
The relatively light abrasion will strip paint body filler and very light rust easily but isn t suited for well established rust.
Once done you can paint over rust.
I am amazed at how many people have not heard of this method before.
On the upside the surface of the sheetmetal is left unaltered.
In consideration that you would be working on a part of your roof be prepared ahead of time how you plan to deal with matching in the paint with the reset of the roof.
Scrub partially rusted metal areas with a wire brush to remove flakes and powdery surface rust then prime with a rust inhibitive primer.
How to remove rust from concrete.
There are a number of rust removal products but the simplest is a quick.
Using baking soda is another way to remove rust from metal.
Make sure that the solution is pasty enough to adhere to the surface then spread it onto the metal and let it sit.
How to remove rust from metal with powerful chemicals the old standby rust remover chemicals contain either phosphoric or hydrochloric acid to dissolve the rust.
You can make a paste by mixing baking soda and water.
As it dries the acid of the vinegar will begin to corrode the surface of the metal and you will start to see rust appear.
Light rust surface rust is the easiest to eliminate especially in sheetmetal where excessive pitting has not formed.
If the metal underneath the paint is rusted you ll need to remove the paint first and then apply a rust removing solution such as vinegar or a commercial rust remover.
Make sure to get as much rust off the surface at this point as possible.
Sand the area with a coarse grit sand paper using a circular motion.