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How to repair rusted out spots near wheel wells that have no support behind?

Repairing rusted-out spots near wheel wells without support behind requires careful preparation, proper materials, and a systematic approach. Here's a step-by-step guide:

Materials Needed:

- Automotive paint in the color of your vehicle

- Primer

- Rust converter

- Sandpaper

- Body filler

- Fiberglass mesh or reinforcement material

- Masking tape

- Gloves and safety gear

- Auto body repair tools

Step 1: Preparation:

- Remove the wheels and any plastic trims around the affected area to gain better access.

Step 2: Remove Rust:

- Scrape off any loose rust using a wire brush or abrasive pad.

- Apply a rust converter to stop the spread of rust.

Step 3: Reinforce the Area:

- Cut out a piece of fiberglass mesh or reinforcement material to fit over the rusted-out area.

- Place the mesh or reinforcement over the area, ensuring it's flush with the surrounding metal.

- Secure the reinforcement using automotive adhesive or fiberglass resin.

Step 4: Apply Body Filler:

- Mix body filler according to package instructions.

- Apply the body filler to the entire rusted-out area, making sure to cover the reinforcement material.

- Smooth the body filler using a putty knife or spatula, giving it a uniform shape.

- Allow the body filler to dry and harden completely.

Step 5: Sanding:

- Once the body filler is dry, use sandpaper to sand down any rough edges and create a smooth surface.

Step 6: Apply Primer:

- Apply a coat of primer specifically designed for automotive use.

- Allow the primer to dry according to the manufacturer's instructions.

Step 7: Painting:

- Mask off the surrounding areas to prevent overspray.

- Apply automotive paint that matches the color of your vehicle.

- Apply multiple light coats, allowing each coat to dry thoroughly before applying the next.

Step 8: Clear Coat (Optional):

- If desired, apply a clear coat to protect the paint and enhance the shine.

Step 9: Reinstall Parts:

- Once the paint is completely dry, reinstall the previously removed wheels and any plastic trims.

Tips and Precautions:

- Wear gloves and safety gear to protect yourself while working.

- Ensure that the fiberglass mesh or reinforcement material is adequately secured to provide structural support.

- Use proper ventilation when working with paints, primers, and other chemicals.

- Be patient and allow each step to dry thoroughly before moving on to the next.

- If the rusted-out area is extensive or involves structural components, it's best to seek professional help from a qualified auto body repair shop.

By following this guide, you can successfully repair rusted-out spots near the wheel wells, even in areas without support.