How To Strip Old Paint

How to strip old layers of paint, stain or varnish

How To Strip Old Paint

How To Strip Old Paint

Surfaces of all kinds often require stripping of old layers of materials for many reasons including safety hazards, cosmetic appearance, adhesion etc. There are numerous methods of surface stripping. However, SICO has recommendations for the easiest, most ergonomic techniques.

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WARNING

WARNING

  • • Protect surrounding surfaces using drop cloths or old newspapers.

  • • Wear protective goggles, rubber gloves and old clothes.

  • • Use chemical stripper in a well-ventilated shady area.

  • • Avoid breathing fumes.

  • • Don’t smoke.

  • • Keep clean water nearby in case solution spatters on skin.

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Learn about

Learn about

  • Stripping with Polyprep 802-105 remover

  • Stripping with Formula 44 remover

  • Stripping with a heat gun

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Stripping painted surface with Polyprep 802-105 chemical remover

Stripping painted surface with Polyprep 802-105 chemical remover

What you need:

 
  • White lint-free rag

  • Metal or glass container

  • Goggles

  • Good quality rubber gloves

  • Metal or wood scrapper

  • Awl for hard-to-reach areas

  • Bucket of lukewarm water

  • Stiff floor brush

  • Putty knife

  • Old natural bristle paintbrushes

  • Shop vacuum cleaner

  • Drop cloth or old newspapers

  • Sandpaper (80 or 120)

  • Stiff bristle brush

  • Stainless steel wool, synthetic wool or synthetic pad

  • Polyprep 802-105 stripper

  • Polyprep 705-107 lacquer thinner

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Step-by-step guide

Step-by-step guide

  1. 1. Shake remover.

  2. 2. Unscrew cap with rag to avoid splattering contents when you apply a slight pressure on the container.

  3. 3. Pour remover into metal or glass container.

  4. 4. Generously apply remover with old bristle brush.

  5. 5. Let remover work until old finish comes off.

  6. 6. Remove old loosened coats of material with the right tools for the surface, such as wood scraper, putty knife with rounded edges, burr cutter, awl, stiff bristle brush, steel wool, synthetic wool or synthetic pad.

  7. 7. Rinse surface with Polyprep 705-107 lacquer thinner or with a power washer using clean water (depending on whether or not you want to preserve surface stability) and let surface dry out.

  8. 8. Repeat as needed.

  9. 9. Rub surface with 80 grade sandpaper on horizontal surfaces and with 120 for vertical surfaces to remove residues and restore surface to its natural appearance. Remove dirt with a shop vacuum.

  10. 10. Let surface dry thoroughly for 2 to 3 dry sunny days before painting. Moisture content should be less than 12%.


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Stripping stained surface with Sico 802-111 or 802-666 (environmental option)

Stripping stained surface with Sico 802-111 or 802-666 (environmental option)

What you need

 
  • White lint-free rag

  • Plastic container or sprayer

  • Hose and nozzle

  • Drop cloth or old newspapers

  • Goggles

  • Good quality rubber gloves

  • Stiff bristled broom or brush

  • Old natural bristle paintbrushes

  • Sandpaper (80 to 120)

  • Shop vacuum cleaner

  • High-pressure washer

  • Chemical remover Sico 802-111 or 802-666


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Eco-option guide

Eco-option guide

  1. 1. Shake remover.

  2. 2. Unscrew cap with rag to avoid splattering contents caused by a slight pressure of the container.

  3. 3. Poor remover into a container or plastic sprayer.

  4. 4. Protect nearby grass and vegetation by lightly dampening these areas with water and covering them with plastic drop cloths.

  5. 5. Test the effectiveness of the product on a small area, rinse and let dry. The time required for the stripper to remove the old finish varies upon the type of surface and coatings being stripped. It generally ranges from 15 to 30 minutes.

  6. 6. Apply solution liberally with an old paintbrush, brush, mop or plastic sprayer.

  7. 7. Let stand until the old coatings have lifted. Keep the surface wet for about 15 minutes while the old coat starts lifting from the surface. If necessary, reapply product as needed to keep the surface wet during the stripping process. Most deteriorated finishes will start lifting after about 15-30 minutes.

  8. 8. When the old coating starts to lift, scrub the surface with a stiff bristle broom or brush.

  9. 9. Rinse the surface with a power washer using clean water. Set the nozzle pressure at 500 lbs./sq. in.

  10. 10. Repeat as needed.

  11. 11. Sprinkle water on nearby vegetation after treatment.

  12. 12. Sand the surface with 80 grade sandpaper on horizontal surfaces and with 120 on vertical surfaces to remove residues.

  13. 13. Remove grime residue and sanding dust using a shop vacuum cleaner.

  14. 14. Let surface dry thoroughly for 2 to 3 dry sunny days before painting. Moisture content should be less than 12%.


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Methods of surface stripping

Methods of surface stripping

Stripping involves removing old layers of paint, stain or varnish. Two stripping processes can be applied outside. One is physical and consists of scraping or burning. The other is chemical. Scraping works on flat surfaces. However, it requires much effort and could mar such surfaces. Burning is mainly applied outdoors and could scorch surfaces or cause them to ignite.

Chemical products provide the easiest method. They are the most certain and most effective way to strip off old coats of paint and varnish from any surface without damage.

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