Sylvie Willis
Whether or not to paint a new fuel tank before installing it is a question that divides automotive enthusiasts. Some advocate for painting, coating, or clear-coating the tank to improve its appearance and protect it from rust, while others argue that it is unnecessary and can even cause problems, such as flaking. Opinions vary on the best products to use, with suggestions including Hammer Paint, Eastwood Zinc-based spray, Boeshield, and bedliner spray. Some recommend using a clear coat to preserve the original look of the tank, while others opt for more colourful options like satin black or silver. Proper preparation is considered key to ensuring the paint adheres well and does not peel.
Characteristics and their values regarding painting a new fuel tank before installing it:
| Characteristics | Values |
|---|---|
| Painting the fuel tank | It is not necessary to paint a new fuel tank before installing it. Some prefer the look of bare metal, while others opt for a clear coat to maintain the appearance. |
| Protection | Painting the tank can provide protection against rust and corrosion, especially if using a zinc-based spray or a coat of oil. |
| Aesthetics | Painting allows for customization and a desired aesthetic. Some prefer a natural galvanized look, while others opt for colours like satin black or silver. |
| Preparation | Proper preparation is crucial for successful painting. This includes cleaning, sanding, de-greasing, and using appropriate primers or sealers. |
| Functionality | Painting the exterior of the tank does not affect its functionality. However, coating the inside of the tank can cause issues, as the coating may start flaking off and cause problems. |
| Product Recommendations | Various products are recommended, including Hammer Paint, Eastwood's Tank Tone, Eastwood Zinc spray, POR-15, and Boeshield. |
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What You'll Learn
Painting the outside of a fuel tank
Preparation:
Before you start painting, it is crucial to prepare the surface of the fuel tank. Begin by cleaning the tank thoroughly to remove any grease, dirt, or debris. Use a degreaser or solvent cleaner and scotchbrite to scrub the surface. Ensure the tank is completely dry before proceeding to the next step.
Masking:
Use tape to mask off any areas that you do not want to paint, such as the fuel filler. Cover the areas behind the tank seam to prevent paint from blowing onto the underside of the tank. Use a reasonable quality painter's tape to ensure clean and precise lines.
Priming:
Apply a coat of primer to the surface of the tank. You can use a self-etch or epoxy primer to ensure better paint adhesion. Allow the primer to dry completely according to the manufacturer's instructions. Lightly sand the primed surface with sandpaper, starting with a lower grit and gradually increasing to a finer grit, such as 240-400 grit, to smooth out any imperfections and create a level surface.
Painting:
Choose a suitable paint for the fuel tank, such as a high-quality enamel or a specialized fuel tank paint like Eastwood's Tank Tone, which has a high zinc content for added durability. Apply the paint using a spray gun or aerosol can, following the manufacturer's instructions for application and drying times. Consider using a color that complements the overall aesthetic of your vehicle.
Clear Coating:
Consider applying a clear coat over the paint to provide additional protection and a glossy finish. You can use a 2K clear coat, which offers excellent durability and resistance to weather, UV rays, fuel, and chemicals. Make sure to follow the specific instructions for activating and applying the clear coat, as it usually has a limited window of application time.
Curing and Installation:
Allow the paint and clear coat to cure completely before installing the fuel tank. Refer to the manufacturer's guidelines for the recommended curing time. Once cured, you can proceed with the installation, ensuring that all necessary seals and fittings are in place.
Remember, it is essential to work in a well-ventilated area and follow all safety precautions when working with paints and chemicals. Taking your time and following these steps will help you achieve a professional-looking and long-lasting paint job on your fuel tank.
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Painting the inside of a fuel tank
If you are considering painting the outside of your fuel tank, there are a few things to keep in mind. Firstly, make sure the tank is in good condition and properly cleaned and prepared before painting. This includes scrubbing, degreasing, solvent cleaning, and using a self-etch or epoxy primer. You can use sandpaper to sand the tank, starting with a coarse grade and then moving to a finer grade. After sanding, wipe down the surface with acetone to provide a good base for the paint.
When you are ready to paint, use a reasonable-quality painter's tape to mask off any parts that don't need paint, like the fuel filler. Use a tack cloth to wipe the surface and remove any dust or dirt before painting. Apply a primer and then sand it with a 240-grit sandpaper, followed by a 400-grit sandpaper to smooth the surface. After the surface is prepared, you can apply your chosen paint with an aerosol can or a paint spray gun.
It is recommended to use a clear coat over the paint to provide a durable finish that is less susceptible to damage from weather, UV rays, fuel, or chemicals. You can use a 2K clear coat or a 2-stage paint system with a 1K basecoat and a 2K clear coat. Allow the paint to dry completely before applying the clear coat.
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Sealing a fuel tank
If you decide to seal your fuel tank, there are several steps you should follow to ensure the best results. Firstly, it is important to clean the tank thoroughly. This can be done using a product like Rustbuster Tank-Kleen caustic detergent and a power wash, or with acetone and an abrasive like screws. If there is rust present, it should be removed using a product like Evapo-Rust, phosphoric acid tank cleaner, or vinegar, and the tank should be dried immediately afterwards.
Once the tank is clean and dry, the next step is to apply the sealant. One popular product for this is POR-15, which has received good reviews from some users. However, there are also reports of this product flaking off in large chunks and causing issues. Other products to consider are Red Kote and Kreem, although these have been known to cause clogging issues in some cases. It is important to follow the manufacturer's instructions carefully when applying the sealant, as improper application can lead to seal failure.
After applying the sealant, it is important to allow adequate curing time before filling the tank with fuel. The recommended curing time can vary depending on the product used, but it is generally at least 24 hours and up to 72 hours or more. During this time, it is important to follow any specific instructions provided by the manufacturer, such as storing the tank in a certain way to ensure proper coating.
In addition to sealing, some people choose to paint their fuel tanks, either for aesthetic reasons or to protect the tank from corrosion. If painting, it is important to properly prepare the surface by scrubbing, degreasing, and solvent cleaning the tank before applying paint. A clear coat can also be applied over the paint for added protection.
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Cleaning a fuel tank before painting
When it comes to fuel tanks, there are various approaches to cleaning and maintenance, depending on the specific situation and preferences. Here is a detailed guide on cleaning a fuel tank before painting, adapted from several sources:
First and foremost, safety should be a top priority when working with fuel tanks. Ensure you are working in a well-ventilated area to avoid inhaling fuel fumes, and keep a fire extinguisher nearby as a precaution against any potential ignition sources. It is also recommended to wear protective gear, such as a face mask and goggles, to safeguard against fumes and potential splashes.
The next step is to remove any fuel from the tank. Utilize a siphon or pump to extract the fuel and transfer it to an approved container. This step is crucial for two reasons: it prevents fuel wastage, and it allows for an inspection of the fuel to identify any signs of contamination or debris.
Once the fuel is safely removed, it's time to address any residue or grime buildup inside the tank. This can be achieved through various methods, depending on the severity of the residue. One suggestion is to use a wire wheel to clean out foam residue, crud, and peeling coating. Additionally, a product like Chemprime can be sprayed inside the tank to dissolve surface oxides and corrosion. For more stubborn gunk and grime, a diesel fuel tank treatment can be used. These treatments employ detergents and solvents to effectively eliminate carbon deposits, varnish, and other contaminants from the fuel system, including injectors and lines.
After thoroughly cleaning the tank, it is essential to prepare the surface for painting. This can involve sanding the tank to create a smooth base for the paint to adhere to. A product like Gas Tank Renu offers a comprehensive approach, as they sandblast, coat, and then bake the tank. Alternatively, you can use a pressure washer to clean the exterior of the tank, and address any crevice corrosion with a product like JB weld. If there are any pinholes or leaks, they should be fixed with epoxy before painting.
Finally, it is worth noting that some sources recommend using a sealer before painting. However, there are mixed opinions on this, as some have experienced issues with the sealer flaking off. If you decide to use a sealer, allow ample curing time before putting the tank back into use. Additionally, ensure that you follow the manufacturer's instructions for any products used, including safety precautions and recommended application methods.
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Different types of paint for fuel tanks
Painting a fuel tank before installing it is a matter of personal preference, but it is generally recommended to protect the tank from corrosion and rust. While some people choose to paint their fuel tanks for aesthetic reasons, others do it to increase the longevity of the tank.
There are several types of paint and coatings suitable for fuel tanks, each with its own advantages and use cases:
Epoxy Primer or Undercoat
An epoxy primer is often used to seal the fuel tank and improve its corrosion resistance. It can also enhance the bond strength of a topcoat. This type of coating is known for its strong adhesion and resistance to tough chemical, acid, or solvent environments.
Phenolic Coatings
Phenolic coatings are chosen for their heat resistance and are ideal for fuel tanks exposed to extreme heat. They are compatible with various chemicals and provide good barrier properties to prevent the permeation of fuels and gases.
Fluoropolymer Coatings
Fluoropolymer coatings are highly specialised and offer exceptional chemical resistance. They are used in tanks that store highly corrosive substances. Fluoropolymer coatings have non-stick properties, aiding in the easy release of substances from the tank walls, and are resistant to UV rays and extreme weather conditions.
Ceramic Heat Reflective Coatings
These coatings are designed to block solar heat, heat load, moisture, and air from reaching the surface. They are ideal for fuel trucks and outdoor tanks to keep them cool in direct sunlight.
Rust Grip®
Rust Grip® is a three-in-one corrosion encapsulation system that acts as a primer, intermediate, and topcoat in a single application. It significantly strengthens surfaces and is one of the most effective anti-rust and anti-corrosion coatings available.
When choosing a paint or coating for a fuel tank, it is essential to consider the tank's usage, environmental factors, and specific requirements, such as resistance to certain fuels, chemicals, or industry standards. Consulting with coating manufacturers and professionals is advisable to select the most suitable material and ensure proper application.
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Frequently asked questions
There is no definitive answer to this question as it depends on personal preference and the condition of the fuel tank. Some people choose to paint their fuel tanks to improve their appearance or protect them from rust, while others leave them unpainted.
Painting a fuel tank can improve its appearance and protect it from rust and corrosion. It can also help to preserve the tank and make it last longer.
Painting a fuel tank can be time-consuming and may not be necessary if the tank is already in good condition. The paint may also peel or flake off over time, especially if the tank is galvanized.
There are several types of paint that can be used on fuel tanks, including satin clear coat, Eastwood Zinc-based spray, and Hammer Paint with a clear coat. It is important to prepare the surface of the tank properly before painting, such as by sanding, cleaning, and priming it.
Yes, some people choose to use a clear coat or a sealer instead of paint to protect their fuel tank. Another alternative is to apply a thin layer of oil, such as Boeshield, to preserve the tank and prevent rust.
