How to Paint Over a Chrome Surface

It is difficult to paint over a chrome surface since one of the inherent qualities of chrome is a smooth and slippery finish. However, using specialized paints and the right chrome painting techniques can make painting over chrome a much easier task.

Method 1

Method 1 of 3:

Protecting Your Health

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1
Know that chrome can have a number of negative impacts on your health. Depending on whether it is inhaled or absorbed through the skin, Chromium can cause irritation to the throat, nose, skin, and eyes, with the possibility of eye damage. It can create symptoms similar to influenza, asthma, and allergies, as well as the possibility of lung cancer with airborne contact.^{[1]XResearch source}
- In addition to chrome, any primer you use likely has the potential to cause not only the same issues above, but also have chronic negative effects on the liver, cardiovascular, reproductive, and urinary systems.
2
Set up your work space in an adequately ventilated area. This will decrease the likelihood of any sickness via inhalation of hazardous materials. More often than not, repair work like this is performed on a garage. This allows fresh air to enter easily and replace any fumes, dusts, or vapors that could bring you harm.
- Keeping your paints and primers closed in their containers while not in use will help maintain a clean atmosphere and limit your exposure to hazardous chemicals.
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This should protect your skin from any contact with the chromium and/or primer. Another option is coveralls. A favorite of those who work in metal shops and auto repair, these are the onesies of safety and provide ample coverage of your appendages and torso.
Since you will be working with corrosive substances, gloves made of thin plastic will not suffice. It is therefore recommended to use gloves made of P.V.C, rubber, or neoprene.^{[2]XResearch source} As for footwear, there are a number of chemical resistant shoes available online. However, since you will not be handling any of the materials with your feet, it's really most important to just find something that completely covers your skin.
If you choose to use an electric sander, this will guard the soft tissue of your eye from any flying debris. It will also block any splashes of paint, primer, and fumes wafting from these substances. Although it is common to simply wear glasses that rest on the ears, it is advisable to use goggles while working with chemicals. This way you have a tight film around the entire eye, and gaseous particles cannot cause you any harm.
It is preferable to select a respirator that conforms to OSHA standards.^{[3]XTrustworthy SourceUS Occupational Safety and Health AdministrationU.S. government agency responsible for setting and enforcing workplace safety standardsGo to source} This will filter out any particles in your paint of primer that could lead to infections of the lungs. Particulate respirators like the N-95 - common to hospitals - are simple and widely available, but insufficient. It is necessary to get something that protects not just from particles but from chemicals, gases, and vapors.^{[4]XTrustworthy SourceCenters for Disease Control and PreventionMain public health institute for the US, run by the Dept. of Health and Human ServicesGo to source}

Method 2

Method 2 of 3:

Preparing the Surface

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1
Wash the chrome with soap and water until it is thoroughly cleaned. Wipe the surface with a dry, bleached cloth and then wait until it is fully dry. This is done before sanding to eliminate the possibility of impressing any foreign particles into the metal and contaminating your work. Using a bleached cloth maintains as close to a sterile environment as possible, which will lead to a better-finished product.
- You can also use bleach wipes for the same results!
2
Hammer out any unwanted bends or dents using a body hammer.^{[5]XResearch source} This must be done before any paint is applied, as hammering later on would damage the coat of paint. If you are working with any metal that has an exterior and interior side, you will always hammer the interior side. So remove any parts that may be blocking access to the interior side. Place a hard material against the exterior surface and hammer out the dent, pressing against the hard material. Move slowly and work around the dent's perimeter towards the center.^{[6]XResearch source}
- Once the dent is hammered out, place your hard material on the interior side. Then lightly hammer the area surrounding your dent to remove any peaks in the metal.
3
Use a media blaster to clean your parts. A blasting gun uses pressurized air to send tiny particles (usually plastic beads, ground-up walnut shells, glass beads, and aluminum oxide) to strip paint from base material, as well as smoothing out very durable metals.^{[7]XResearch source}
- In order to contain the mess of media blasters, it is recommended to use a blasting cabinet. This will decrease the size of your work space, but also maintains cleanliness.
- In addition to the PPE (Personal Protective Equipment) already in use, it is safest to use some form of ear protection with media blasters as they create a loud noise and could cause hearing damage/problems.
4
Sand the chrome exterior using sandpaper. Start with a grit less than 160 to remove a majority of the particles. Afterwards, use 320 grit sandpaper to remove any marks left by the first round, and give a smoother finish.
- Sandpaper is easier to acquire than a blasting gun, but depending on the size and makeup of the chrome surface, it can be the most difficult procedure.
- Note that with sanding it is important to be careful and use an equal amount of time and pressure over the entire surface to ensure an even result. This will create an ideal surface where the paint will stick more easily, and course texture won't show through the paint.
Spray down the parts with wax and grease remover. It is easiest to use an atomizer bottle to coat all surfaces. Use clean, bleached rags to wipe everything off.

Method 3

Method 3 of 3:

Painting Over Chrome With a Spray Gun or Spray Paint

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1
Guard your workspace from unintended painting. Cover surfaces like trim, windows, and floors with drop cloth. The drop cloth is suitable for painting since it absorbs paint easily and allows for smooth painting.^{[8]XResearch source}
- At this point it is safest to clear the floor of any potential tripping hazard that could catch on the sprayer hose.
2
Mix your primer and strain it to prevent any clogs in the spray gun's tip and internal filters. Wooden sticks are commonly provided with purchased paint and work well with mixing. To strain, use a scrap window screen or an old pair of panty hose.^{[9]XResearch source} This will remove any foreign particles or lumps and guarantee a smooth coat.
- Use a Two-Part Epoxy Primer as they are waterproof, resist corrosion, and offer the best level of adhesion for metal and industrial painting.
Hanging your pieces gives you closer to a 360º access while painting. This will also work well for bottled spray paint. If however you do not have access to a stand, simply spray the pieces over an ample piece of drop cloth.
Evenly coat the pieces with Two-Part Epoxy Primer using your spray gun. Allow them to dry, and add a second coat.^{[10]XResearch source} If using bottled spray paint, apply the primer as evenly as possible all around the metal part.
Store your primer in a cool, dry, and well-ventilated area. Also check to ensure the seal on your container is air-tight. Primer will not expire if properly stored, but it will evaporate if not securely sealed. Also keep in mind that primer is flammable and should be kept away from open flames, points of ignition, and temperatures over 100ºF.
Clean the spray gun properly before adding your chosen paint. Make sure to remove your compressed air source and air regulator before you begin cleaning. It is important that a spray gun is thoroughly cleansed before you switch to a new substance, so follow the related How.com.vn's instructions closely before moving on.
$How.com.vn English: Step 7 Mix and strain any paint to be used with the spray gun.$
More often than not, paint stores will be glad to provide a wooden paddle for stirring. Be sure to ask for one with your purchase. As with the primer, using scratch window screen is an effective and simple way to filter out any lumps or foreign particles from your paint.
There are a few keys to keep in mind while painting. Maintain a distance of about 6 inches between the tip of the spray gun and the material surface. Using a sweeping motion that goes side to side while painting. If the spray gun is not in motion, then do not pull the trigger. This can lead to uneven, blotchy painting.^{[11]XResearch source}Allow the paint to dry completely; this often takes 20 minutes to an hour for each coat.
The clear-coat finish will also protect the chrome against rust and dust. Follow the same tips you did in the previous step.
You can then buff the chrome exterior using a buffing cloth and buffing compound to give it a glossy shine.

Expert Q&A

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Question
What primer should I use to prep stainless steel?
Mark Spelman
Construction Professional
Mark Spelman is a General Contractor based in Austin, Texas. With over 30 years of construction experience, Mark specializes in constructing interiors, project management, and project estimation. He has been a construction professional since 1987.
Mark Spelman
Construction Professional
Expert Answer
If you want to prep stainless steal, use an oil based bonding primer for best results.
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What happens if after painting I get some runs. Can I wet sand it with 2000 grit sandpaper then try painting it again?
Mark Spelman
Construction Professional
Mark Spelman is a General Contractor based in Austin, Texas. With over 30 years of construction experience, Mark specializes in constructing interiors, project management, and project estimation. He has been a construction professional since 1987.
Mark Spelman
Construction Professional
Expert Answer
Yes, you can try painting it again. Make sure you sand beforehand, and ensure that the paint it well cured before sanding.
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Things You'll Need

Soap
Water
Dry, bleached cloth
Body hammer
Sandpaper
Wax and grease remover
Drop cloth or newspaper
Air compressor with regulator
Air hose and couplings
Spray gun
Two-part epoxy primer
Automotive paint
Automotive clear-coat paint
Buffing cloth
Buffing compound

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Warnings

Don't sand the chrome more than the necessary amount since this will make it thinner. It is better to use regular sandpaper rather than an electric sander to make sure you sand the right amount.
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