How to Strip Paint with a Heat Gun

Heat guns strip paint faster than chemicals and with less mess. Here's how to do it properly and safely.

Before You Start

Lead Paint Warning

Paint in houses built before 1978 may contain lead. Heating lead paint releases toxic fumes. Test old paint first, or assume it contains lead and take appropriate precautions (proper respirator, disposal as hazardous waste).

What You Need

• Heat gun with appropriate temperature
• Paint scraper (various sizes)
• Metal container for hot paint scrapings
• Heat-resistant gloves
• Safety glasses
• Ventilation
• Dust sheets below

Temperature Settings

Start around 400-500C for most paint. Higher isn't always better - it's easier to scorch the wood.

• Too cold - Paint doesn't soften, scraper gouges the wood
• Too hot - Paint burns, wood scorches, risk of fire
• Right temperature - Paint bubbles and lifts, scrapes cleanly

Technique

Basic Process

1. Hold the heat gun 2-3 inches from the surface
2. Keep it moving - don't concentrate on one spot
3. Watch for the paint to bubble and wrinkle
4. Move the gun ahead while scraping behind
5. Push the scraper under the softened paint
6. Deposit hot paint in metal container

Work Pattern

Work from bottom to top on vertical surfaces. Hot air rises, pre-heating the paint above where you're working.

Around Glass

Heat cracks glass. Use a deflector nozzle that directs heat away from glass while working on window frames. Keep the heat moving.

Details and Mouldings

Use a narrower scraper or shave hook for detailed areas. A smaller concentrator nozzle helps focus heat. Take your time.

Multiple Paint Layers

Old woodwork often has many paint layers. You may need to:

• Strip the top layers first, then go back for deeper layers
• Use chemical stripper for stubborn residue in grain
• Accept some paint in deep grain (it can be painted over)

Finishing

After stripping:

1. Let the surface cool completely
2. Sand to remove any remaining residue and smooth the surface
3. Fill any damage with appropriate filler
4. Sand the filler when dry
5. Clean off all dust before repainting

Safety Points

• Never leave a hot heat gun unattended
• Keep away from flammable materials
• Work in ventilated areas - fumes are unpleasant and potentially toxic
• Wear appropriate protection
• Have water nearby in case of fire
• Let the gun cool before storing
• Paint scrapings can stay hot for some time - use a metal container

When to Use Chemical Strippers Instead

• Known or suspected lead paint
• Very detailed work where heat might damage
• Near glass you can't protect
• When fumes are a concern (poor ventilation)
• On heat-sensitive materials

Find heat guns in our heat gun collection.