The short answer is yes, you can spray Fluid Film with a paint gun, but with significant caveats. Using a conventional paint gun designed for thinner liquids can lead to clogging, inefficient application, and even damage to the gun. This article, drawing on my extensive experience in automotive maintenance and corrosion prevention, provides a comprehensive guide on how to successfully apply Fluid Film using various spraying methods, focusing on best practices and addressing common concerns.
Understanding Fluid Film and Its Application Challenges
Fluid Film is a lanolin-based rust and corrosion preventative renowned for its penetrating properties and ability to cling to metal surfaces. Unlike paints or coatings that cure and form a hard shell, Fluid Film remains fluid, offering continuous protection against moisture and salt. This characteristic, however, presents unique challenges when it comes to application. Its viscosity is significantly higher than most paints and solvents, meaning conventional paint guns require modification or specialized equipment for optimal performance. The pressure required to atomize thicker fluids can also lead to overspray and material wastage if not carefully managed. Choosing the correct equipment and understanding the techniques involved are crucial for achieving a consistent and effective application.
Equipment Choices for Fluid Film Application
While a standard paint gun can be used, it’s generally not the best option. Here are some preferable alternatives:
- Undercoating Guns: These guns are specifically designed to handle thicker fluids and often come with adjustable nozzles and air pressures to achieve the desired spray pattern. They are a cost-effective and reliable option for applying Fluid Film.
- HVLP (High Volume Low Pressure) Guns: While typically used for paint, some HVLP guns can be adapted for Fluid Film application by using a larger nozzle size and adjusting the air pressure. However, you must ensure the gun’s internal components can handle the lanolin-based formula without damage. Dilution may be necessary, but do so sparingly, using only mineral spirits (as recommended by Fluid Film) and never exceeding a 10% dilution ratio.
- Airless Sprayers: These sprayers use high pressure to atomize the fluid, eliminating the need for compressed air. They are typically used for larger projects and can handle thicker fluids with ease. However, they can be overkill for smaller applications and require careful cleaning and maintenance.
- Aerosol Cans: For small touch-ups or hard-to-reach areas, aerosol cans of Fluid Film are a convenient and readily available option.
- Fluid Film’s NAS Fluid Film Spray Gun: This is designed specifically for this purpose.
Ultimately, the best choice depends on the size of the project, the desired finish, and your budget. Regardless of the equipment you choose, proper cleaning and maintenance are essential to ensure optimal performance and longevity.
Modifying a Paint Gun for Fluid Film (If Necessary)
If you’re determined to use a standard paint gun, here’s what you need to consider:
- Nozzle Size: The most crucial factor is using a larger nozzle size, typically 2.0mm or larger. This will allow the thicker Fluid Film to flow more easily without clogging.
- Air Pressure: You’ll likely need to increase the air pressure compared to painting. Start with a higher pressure and gradually reduce it until you achieve a consistent spray pattern without excessive overspray.
- Dilution: As mentioned before, diluting Fluid Film should be a last resort, and only with mineral spirits. Over-dilution will reduce its effectiveness.
- Cleaning: Thorough cleaning immediately after use is critical. Disassemble the gun and clean all components with mineral spirits to remove any residue. This will prevent clogging and ensure the gun is ready for future use.
Best Practices for Spraying Fluid Film
- Preparation is Key: Clean the surfaces to be treated thoroughly. Remove any loose rust, dirt, or debris. While Fluid Film can penetrate existing rust, a clean surface will ensure better adhesion and longevity.
- Warm the Fluid Film: Warming the Fluid Film slightly (not exceeding 120°F) will reduce its viscosity and make it easier to spray. You can achieve this by placing the can or container in warm water.
- Consistent Application: Apply Fluid Film in thin, even coats. Avoid pooling or dripping. Multiple thin coats are more effective than one thick coat.
- Proper Ventilation: Ensure adequate ventilation when spraying Fluid Film, as it can release fumes. Wear a respirator mask to protect yourself from inhalation.
- Targeted Application: Focus on areas prone to rust and corrosion, such as seams, joints, and undercarriage components. Don’t forget to apply Fluid Film inside enclosed areas like rocker panels and frame rails (using a wand attachment if available).
Frequently Asked Questions (FAQs)
FAQ 1: Will Fluid Film damage rubber or plastic components?
No, Fluid Film is generally safe for rubber and plastic components. In fact, it can help to condition and protect them. However, it’s always best to test a small, inconspicuous area first to ensure compatibility, especially with older or degraded materials.
FAQ 2: How often should I reapply Fluid Film?
The reapplication frequency depends on the climate and driving conditions. In areas with heavy salt use during winter, annual reapplication is recommended. In milder climates, every two years may suffice. Inspect the treated areas periodically and reapply as needed.
FAQ 3: Can Fluid Film be applied over existing rust?
Yes, Fluid Film can be applied over existing rust. Its penetrating properties allow it to seep into the rust and displace moisture, helping to prevent further corrosion. However, removing loose rust beforehand will improve adhesion and effectiveness.
FAQ 4: Is Fluid Film flammable?
Yes, Fluid Film is flammable. Keep it away from open flames and heat sources. Follow all safety precautions outlined on the product label.
FAQ 5: What is the best way to clean up Fluid Film overspray?
Mineral spirits or a citrus-based cleaner can be used to clean up Fluid Film overspray. Wipe the affected area with a clean cloth soaked in the cleaner.
FAQ 6: Does Fluid Film attract dirt and dust?
Due to its tacky nature, Fluid Film can attract some dirt and dust. This is more noticeable in dusty environments. While this doesn’t significantly affect its performance, you can wipe down the treated areas periodically to remove excess debris.
FAQ 7: Can I paint over Fluid Film?
Painting over Fluid Film is not recommended. Its oily consistency will prevent the paint from adhering properly. If you need to paint, remove the Fluid Film completely with mineral spirits before applying primer and paint.
FAQ 8: What are the alternatives to Fluid Film?
Alternatives include Waxoyl, Woolwax, and Cosmoline. Each product has its own advantages and disadvantages in terms of application, cost, and longevity.
FAQ 9: How long does Fluid Film take to dry?
Fluid Film doesn’t dry in the traditional sense. It remains fluid, providing continuous protection. It may become less tacky over time as it absorbs into the metal.
FAQ 10: Can Fluid Film be used on electrical connections?
Yes, Fluid Film can be used on electrical connections to prevent corrosion and improve conductivity. Apply a thin coat to the terminals and connectors.
FAQ 11: Is Fluid Film safe for the environment?
Fluid Film is a relatively environmentally friendly product compared to some other rust inhibitors. It’s lanolin-based and contains no solvents or harmful chemicals. However, proper disposal of used containers and overspray is still important.
FAQ 12: Where can I purchase Fluid Film?
Fluid Film is widely available at automotive supply stores, hardware stores, and online retailers.
Conclusion
While spraying Fluid Film with a paint gun is technically possible, it requires careful consideration and preparation. Choosing the right equipment, adjusting settings appropriately, and following best practices will significantly improve the application process and ensure optimal results. By understanding the challenges and limitations, you can effectively protect your vehicles and equipment from the damaging effects of rust and corrosion with Fluid Film. Remember to prioritize safety, cleanliness, and proper maintenance to maximize the lifespan of your application equipment and the effectiveness of the Fluid Film itself.