How to Fix Rust Under Paint

Intermediate 30 min 15 steps 7405 views Rating: 4.4/5 Published: 2026-02-16

Try to sand and repaint minor rust only.. Clean the surface with a gentle solvent.. Sand the surface paint away with 80-grit sandpaper.

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Steps

1

Try to sand and repaint minor rust only.

Step 1

Try to sand and repaint minor rust only.

2

Clean the surface with a gentle solvent.

Step 2

Clean the surface with a gentle solvent.

3

Sand the surface paint away with 80-grit sandpaper.

Step 3

Sand the surface paint away with 80-grit sandpaper.

4

Remove rust flakes with a wire brush.

Step 4

Remove rust flakes with a wire brush.

5

Sand the rust until you reach the bare metal.

Step 5

Sand the rust until you reach the bare metal.

6

Finish up with fine-grit sandpaper to make sure the surface is smooth.

Step 6

Finish up with fine-grit sandpaper to make sure the surface is smooth.

7

Clean the metal to remove dust and dirt before priming.

Step 7

Clean the metal to remove dust and dirt before priming.

8

Get metal spray paint that matches the original paint color.

Step 8

Get metal spray paint that matches the original paint color.

9

Apply a metal primer to the bare spot.

Step 9

Apply a metal primer to the bare spot.

10

Wait for the primer to dry.

Step 10

Wait for the primer to dry.

11

Sand the dry primer with fine-grit sandpaper.

Step 11

Sand the dry primer with fine-grit sandpaper.

12

Wipe the area with water and dish soap to remove any sanding dust.

Step 12

Wipe the area with water and dish soap to remove any sanding dust.

13

Spray a coat of paint onto the spot.

Step 13

Spray a coat of paint onto the spot.

14

Apply a final coat when the paint dries.

Step 14

Apply a final coat when the paint dries.

15

Let the paint dry and cure entirely.

Step 15

Let the paint dry and cure entirely.

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