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How to Paint Previously Woodstained or Varnished Wood

Stains and varnishes make the surface of wood less porous creating adhesion issues when painting with everyday decorative paints. That’s why we wanted to show you a way to easily paint over interior or exterior wood that has been varnished or stained with professional products that are favoured by the trade. This method explains how to prime and seal in one, without lots of sanding or removal of the existing finishes.

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Surface Preparation

All surfaces must be clean, dry and free from anything that will interfere with the adhesion of the materials to be applied. Remove loose and failing material by scraping or by the use of a hot air stripper to a sound edge. Feather sound edges with a fine grade abrasive paper. Prior to painting, the moisture content should not exceed 18%. Remove all dust. Remove all visible signs of organic growth and treat the areas with Zinsser Mould Killer & Remover in accordance with the manufacturer’s instructions. Allow to dry.

For any areas with remaining sound paint wash with hot water and liquid detergent solution to remove any contaminants, frequently changing the water. Rinse thoroughly with clean water to remove all residues. Allow to dry. Degrease thoroughly with methylated spirit, changing cloths regularly. Ensure all silicone polish/wax is removed. Fill any cracks and small surface defects with Zinsser Ready Patch or Zinsser Ready Patch Lite in accordance with the manufacturer’s instructions. Allow to dry.

Rub down with a fine grade abrasive paper. Remove all dust.

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Priming (Interior)

Prime all areas to be decorated with one full coat of Zinsser B-I-N Primer Sealer in accordance with the manufacturer’s instructions. Allow a minimum drying time of 45 minutes in normal drying conditions.

Priming (Exterior)

Prime all areas to be decorated with one full coat of Zinsser Cover Stain Primer Sealer in accordance with the manufacturer’s instructions. Allow a minimum drying time of 2 hours in normal drying conditions.

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Decoration (Interior)

Decorate with two full coats of Zinsser Perma-White Interior Eggshell, Satin or Semi-Gloss in accordance with the manufacturer’s instructions. Allow a minimum drying time of two hours between coats.

Decoration (Exterior)

Decorate with two full coats of Zinsser AllCoat Exterior Satin or Gloss in accordance with the manufacturer’s instructions. Allow a minimum drying time of 1 hour between coats.

Note: It is recommended to stripe coat edges to promote adhesion.

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