Where theworld gathers for metal finishing
Q&As since 1989
-----
Cleaning Galvanized Metal and Keeping It Shiny
Q. I am a former carpenter and now a business writer. I have remodeled a rental house and want to achieve a consistent shiny finish for not much investment. My son and I are doing most of the work ourselves.
I have installed several dozen cheap 2' wide x 8' long corrugated galvanized steel sheets from Home Depot vertically on the sides of my rental house. There is some whitish scale on the sheets and I am looking for a fairly simple method to bring the metal to a consistent shiny finish.
Is there a fairly non-toxic chemical I can clean it with? If there is, do I need to apply it with a wet rag, spray it on or brush it on and rinse it off with water, or what method is least labor intensive and most effective? Will I need to buff it? What type of finish or clearcoat can I apply after it is cleaned so as to keep it shiny. How often will I need to refinish the surface.
Hobbyist - Portland, Oregon, USA
2005
Incralac
(brass lacquer with benzotriazole)
on
eBay
or
Amazon
(affil links)
A. 5% sulfuric is standard solution for cleaning of zinc,but I think that 5% ammonium citrate solution is safer and less dangerous(dissolve 50 gm citric acid [on
eBay or
Amazon] in 1 lit water, add some ammonia, pH must be 7). Rinse well! For lacquering you can use Incralac
[on
eBay or
Amazon]
or any other similar proprietary product (solution of Paraloid B 44 and benzotriazole
[on
eBay or
Amazon]
corrosion inhibitor).
Good luck!
- Cerovski vrh Croatia
2005
Q. I am using metal from an old barn to make a ceiling for a kitchen. The back side of the tin was never painted.
1. What is the best way to clean it , get a shine and keep it shining?
2. Do I have to worry about the other side of the metal with the rust and old silver paint?
hobbyist - new oxford Pennsylvania
July 5, 2017
Q, A, or Comment on THIS thread -or- Start a NEW Thread