Maintenance & Cleaning
Prevent damage
You will want to do a monthly inspection of all the metal surfaces. If you notice the beginning of staining or oxidation on your metal surfaces, you will want to take action immediately before the problem grows and becomes a costly replacement of the damaged metal.
- Start off by cleaning the affected surfaces with the most effective solutions called for based off the surface. Different cleaning solutions are listed below.
- After Clean and Polish, clean the metal, apply the finishing that was on before. The finishing will an added layer of defense against water, sunlight and air.
- Regular cleaning will keep the metal looking attractive.
Galvanized surface:
- Check the galvanized coating for any damaged areas such as scales, nicks, scratches, scrapes, cuts or rusting.
- Clean damaged or rusted area and coat with a zinc-enriched paint such as ZRC (or equivalent) per ASTM A780.
Painted surface:
- Check the paint film for any damage areas such as scales, nicks, scratches, scrapes, cuts or rusting.
- Clean damaged or rusted areas and apply a prime and top coat per manufacturer’s recommendation.
Anodized surface:
- Check the anodized surface for any damage areas such as scales, nicks, scratches, scraps, cuts or rusting.
- Clean the entire anodized surface with mild, non-detergent soap and water
basics of rust
repainting metal
Basic Cleaning
It is important to rinse cleaners thoroughly. Detergents, ammoniated cleaners and bleaches leave corrosive residues if not rinsed properly. Solvent and detergent residues attract dirt. Cleaner residues can resemble chalk and are usually unsightly. When cleaning compounds remain on the building, it will not only get dirty faster but may also be subject to more rapid corrosion. Powder and liquid laundry detergents are excellent general cleaners. The low concentration dishwashing detergents are milder and could be all that is needed. Some mildew will not come off even with strong detergents. In these situations, bleach may be helpful. The colorfast bleaches used in powdered detergents may be helpful but can be too mild for stubborn mildew stains. Household bleach should work well on heavy mildew. Ammonia is especially good at cleaning greasy dirt when solvents are inappropriate. Always dilute and mix it in well-ventilated areas.
Exposed surfaces of powder coated products that are deemed the most critical should be cleaned regularly (on either a weekly or a bi-weekly schedule). These can be wiped down and rinsed with filtered water.
In coastal areas, salt water can damage the metal situated close to the ocean. If they are not thoroughly cleaned at least once a year to remove the buildup, salt will remain attached to the finishing and dull its appearance, leaving it looking chalky.
Power washing
The pressure washer should be used on a low-pressure setting with filtered water. Don’t use unfiltered tap water or groundwater. If you use unfiltered groundwater for cleaning, it can leave stains on the metal surface. If the water contains fluoride, sulfur, iron oxide or chlorine, they can stain outdoor products. Power washing is not always recommended for all metals, talk to an expert before power washing. Be aware that power washing is a science. If done incorrectly, it can cause damage such as removal of the finishing which can result in future rusting. If power washing is needed, then get a professional who knows how clean the metal and can warranty their work. If any damages occur, then their insurance should pay for replacement. Always inspect the work after it’s complete, before issuing final payment.
Mildew or Mold
- For white metal: Apply a solution of one part bleach to four parts water in a pump up sprayer. Leave on for 10-20 minutes, rinse with a garden hose, and allow to dry in full sun.
- For colored metal: Apply a solution of 1/4 cup white vinegar to one quart water in a pump up sprayer. Leave on for 10-20 minutes then rinse with a garden hose, and allow to dry in full sun.
Some mildew will not come off even with strong detergents. In these situations, bleach may be helpful. The colorfast bleaches used in powdered detergents may be helpful but can be too mild for stubborn mildew stains. Household bleach should work well on heavy mildew.
Restore Shine & Prevent Oxidation
- Apply a coat of automotive paste or metal wax to the surface.
- Allow the wax to dry for a few minutes.
- Wipe off any residue with a clean cloth.