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How do you fix fish eye paint on car?

Fish eye in car paint is caused by contaminants on the surface before painting, preventing the paint from properly adhering. Fixing it isn't a simple fix and often requires removing the affected paint and starting again. Here's a breakdown of how to approach it:

1. Identify the Cause:

Before you start, try to figure out *why* you have fish eye. Common culprits include:

* Silicone: This is the most frequent cause. It can come from various sources like polishes, waxes, tire shine, or even certain degreasers. It's extremely difficult to remove completely.

* Oil: Oil residue from fingerprints, improper cleaning, or leaking seals can also cause fish eye.

* Other Contaminants: Things like dust, insect repellent, or release agents can also interfere with adhesion.

2. Preparation is Key (This is the most crucial step):

* Thorough Cleaning: Wash the affected area meticulously with a high-quality car wash soap. Use a degreasing agent *specifically designed for automotive use* if you suspect oil or silicone contamination. Pay close attention to detail.

* Degreaser: After washing, use a dedicated automotive degreaser following its instructions. Let it dwell for the recommended time. Rinse thoroughly. Consider using a solvent-based degreaser designed to remove silicones, but be cautious and follow safety precautions. Always test in an inconspicuous area first.

* Solvent Wipe Down: Once degreased, wipe down the surface with a tack cloth or a clean, lint-free cloth dampened with a suitable solvent like wax and grease remover. This will remove any remaining residue.

3. Repainting:

If the fish eye is minor and only in a small area, you *might* be able to sand it smooth (very lightly with very fine grit sandpaper – 2000 grit or higher) and then reapply a light coat of clear coat. However, this is only a temporary fix and might not work if the underlying issue (silicone contamination) persists.

For more significant fish eye, or if the light sanding/clear coat fix fails, you'll likely need to:

* Remove the affected paint: This may require sanding the area down to bare metal or primer, depending on the severity of the fish eye. This is best done with progressively finer grits of sandpaper.

* Properly prepare the surface: After sanding, use a suitable automotive primer, ensuring the surface is clean and free from dust.

* Repaint: Apply several thin coats of base coat and clear coat, allowing each coat to dry and flash off completely before applying the next.

4. Professional Help:

If you're not comfortable with any of these steps, especially the sanding and repainting, it's highly recommended to take your car to a professional auto body shop. They have the experience and equipment to properly address fish eye and achieve a professional-looking finish. Attempting a DIY repair without the necessary skill and tools may result in a worse outcome.

Important Considerations:

* Safety: Always wear appropriate safety gear, including a respirator, safety glasses, and gloves when working with solvents, sanding, and paint.

* Ventilation: Work in a well-ventilated area.

* Test Areas: Always test any cleaning solutions or products in an inconspicuous area first to ensure compatibility and avoid damage.

Fish eye is a frustrating problem, but with careful attention to detail and preparation, you can often resolve it. Remember, prevention is better than cure; always ensure your paint surfaces are meticulously clean before applying any paint or clear coat.