For automotive projects, Rust Bullet is best applied using a High Volume Low Pressure (HVLP) sprayer, which can provide a smooth and even application. It is recommended spray applications are done by experienced users to ensure a successful application. Here are the recommendations for using Rust Bullet with an HVLP sprayer:
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- Rust Bullet’s high solids content requires a robust sprayer capable of handling thicker materials. A nozzle size of 1.7mm to 2.0mm is generally recommended. This size allows for efficient spraying of the coating without clogging.
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- Stir the Rust Bullet coating thoroughly before use to ensure even distribution of the solids. Stir by hand until homogenous, approximately 3 minutes. Avoid whipping air into the coating and do not use mechanical means to mix.
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- Rust Bullet coatings are ready to use right from the can. Thin only with Rust Bullet Solvent when necessary, not to exceed 5%. Do not over-thin, as this can affect the coating’s performance.
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- Perform a test spray on a piece of cardboard or a similar surface to adjust the sprayer settings and ensure a smooth, even spray pattern.
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- Prior to spraying, run Rust Bullet Solvent through the spray equipment to remove any moisture trapped in the sprayer. Flush Rust Bullet Solvent through pump, line, and gun to remove any existing moisture or alcohol from previous coatings or solvents.
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- After each coat of Rust Bullet is applied, flush the gun, or submerge the tip in Rust Bullet Solvent.
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- Application equipment and filters must be cleaned after use to avoid damage to the sprayer. Any remaining Rust Bullet coating will cure and likely destroy the equipment.
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- When the spray gun is not in use, such as between coats, it should be completely submerged in a container of solvent.
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- Straining through a nylon bag strainer is recommended.
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- Inspect all spray equipment to ensure it is clean and in good working order prior to application.
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- Do not re-circulate the Rust Bullet Solvent through the pump, as the Solvent will be contaminated with moisture and debris.
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- Apply Rust Bullet in multiple thin coats rather than one thick coat. This helps to achieve an even application and better curing.
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- Overspray is unavoidable with a spray application; however, most sprayers now have adjustable pressure control to spray a wider range of materials with more control and reduced overspray.
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- Overspray is controlled by the operator and the choices made, such as tip size, tip condition, pressure, distance, angle of spray gun in relation to surface, wind, etc.
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- Any sprayer will produce some form of overspray, but there are two main ways to help reduce the overspray; a) set the pressure control at the lowest possible pressure, while still maintaining a solid fan pattern; b) ensure that the correct tip size is being used. Using a tip that is too large will only result in excess paint being applied to the surface.
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- Ensure that minimum cure times are followed before the application of a subsequent coat, approximately two to six hours.