How to Fix Cracked, Chipped or Peeling Shutter Paint

Paint damage on shutters is usually down to moisture getting in, the wood expanding and contracting with seasonal temperature changes, or the original paint job being applied without proper prep.

It looks worse than it is. Most repairs take under an hour and you don’t need specialist skills to get a clean result.

What You’ll Need

Tools

• Fine-grit sandpaper (120-grit and 240-grit)
• Sanding block or small sanding pad
• Paintbrushes (a small detail brush and a wider brush for flat panels)
• Clean cloths or tack cloth
• Painter’s masking tape

Materials / Replacement Parts

• Exterior wood filler or flexible filler (for cracks and chips)
• Wood primer or adhesion primer (if bare wood is exposed)
• Matched paint (exterior-grade if your shutters are outside, and ask your supplier for a colour match if needed)
• Fine surface filler (optional, for hairline cracks)
• White spirit or appropriate cleaner for brush cleanup

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How to Fix It: Step-by-Step

Step 1: Assess and Prepare the Damaged Area

Before reaching for any filler or paint, get a clear picture of what you’re dealing with. Run your hand over the damaged area. If the paint is lifting, flaking or bubbling, it needs to come off before anything else goes on top. Painting over loose paint is the most common reason repairs fail within weeks.

• Remove all loose and peeling paint by hand first, then use 120-grit sandpaper to take back to a stable edge
• Feather the sanded area outward so there’s no sharp raised lip where the damage meets the intact paint
• If you find bare wood underneath, make a note, because it’ll need priming before the topcoat
• Wipe everything down with a damp cloth and let it dry completely before moving on

Step 2: Fill Cracks and Chips

Small hairline cracks can take a fine surface filler. Anything wider than a hairline, or any chip with depth to it, needs a proper wood filler that’s rated for exterior use if the shutters are outside.

• Apply filler with a small flexible knife or your finger, pressing it firmly into the crack or chip
• Overfill slightly. Wood filler shrinks as it dries
• Leave to dry fully (check the product instructions, most need at least 30-60 minutes)
• Sand back flush with 240-grit sandpaper, then run your hand over it. You shouldn’t be able to feel the repair
• Wipe away all dust with a tack cloth before priming

Step 3: Prime and Seal

This step gets skipped more than any other. Don’t skip it. Bare wood soaks up topcoat and the repair will show through, even if it looks fine at first.

• Apply a coat of primer to any bare wood or filled areas and let it dry fully
• Lightly sand the primed area with 240-grit once dry, just to knock back any texture
• Wipe clean before painting. You want a dust-free surface

If the rest of the shutter paint is sound, you only need to prime the repaired spots, not the whole shutter.

Step 4: Apply the Topcoat and Check the Result

Thin coats are the answer here. One thick coat looks fine wet and turns patchy as it dries.

• Apply your first coat of matched paint with a good-quality brush, working with the grain of the wood
• Let it dry completely before deciding if it needs a second coat (drying time varies by product but typically 2-4 hours)
• Apply a second coat if the repair is still visible
• Once fully dry, view the repair in raking light (angled sunlight or a torch held low to the surface) to spot any texture or sheen difference
• If there’s a sheen mismatch, a light sand with 400-grit and a final thin coat usually sorts it