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Woodcare - timber decking

Resene Popular Paint Systems –
Exterior and interior woodcare© (stains and clear finishes): training notes

This web page is an edited version of the Resene Best System Selling training notes provided to Resene staff and is provided to enable you to gain a greater understanding of the substrates and paint systems you may encounter in your decorating project. It is impossible to cover all decorating scenarios in a single document, so if you are in doubt about any aspect of your project please contact Resene for assistance.

How to finish hardwood - kwila decking

Note: Refer to the PDF flowchart for a visual of the steps below:

Weathered and greyed:

  1. Treat moss and mould using Resene Moss & Mould Killer.

  2. Wash and scrub using Resene Timber and Deck Wash.

  3. Finish options:


  1. If practical allow to weather for 4-5 weeks.

  2. Wash using Resene Timber and Deck Wash, rinse thoroughly and allow to dry - see notes.

  3. Finish options:

How to finish pine and macrocarpa decking

Note: Refer to the PDF flowchart for a visual of the steps below:

Weathered and greyed:

  1. Treat moss and mould using Resene Moss & Mould Killer.

  2. Wash and scrub using Resene Timber and Deck Wash.

  3. Finish options:


  1. Wash using Resene Timber and Deck Wash to open the timber fibres.

  2. Finish options:

Hardwood - Kwila and Pine and Macrocarpa decking


  • Kwila contains a water soluble tannin that rapidly leaches out when wet (rain or if hosed) – the tannin will stain concrete and tiles, which is why furniture manufacturers recommend it is either left to weather on grass or washed off using Resene Timber and Deck Wash (usually takes 2 or 3 washes).

  • Resene Kwila Timber Stain helps retain the original colour but the Kwila itself will quickly fade (as the tannin leaches out) and the stain will need a further application after 3-6 months.

  • Ideally allow Kwila to weather for 4-6 weeks. Resene Kwila Timber Stain and solventborne Resene Woodsman will be absorbed more readily and last longer.

  • While many customers prefer the grey aged look of hardwood timbers – such as Kwila, this doesn’t always suit a home’s colour scheme. Additionally hardwood timbers do not last forever and after 12-15 years, they will eventually rot where they sit on the deck joists. Staining with Resene Kwila Timber Stain on the underside before fixing the decking timber will help resist rot.

  • Sand using 100-120 grit garnet sandpaper to remove any identification markings, oil residues and discoloured areas.

  • Brushing is necessary every couple of years to get the stain into the edges and end grain but it is hard on the applicator’s back. Rolling and using the deck pad work well, and is much quicker, and easier on the body.

  • Pine decks often have the decktread facing upwards, this will wear more quickly and can be prone to splintering.

  • Painting with Resene Lumbersider (ideally after applying Resene TimberLock) is also a popular option and customers should be advised of this.

  • Resene Kwila Timber Stain was developed to enhance Kwila and other hardwoods and is not suitable for Pine. Use solventborne Resene Woodsman in either Resene Cedar, Resene Cherrywood or Resene Dark Oak if you want your Pine deck to resemble Kwila. Try testpots and use on off-cuts first.

  • Resene Furniture and Decking Oil is a non film forming transparent oil finish that gives mould and U.V. protection to the timber. It does not offer the same level of protection as a pigmented semi-transparent stain such as Resene Woodsman and will need more frequent maintenance as a result (annual application).

  • Resene Lumbersider and Resene Non-Skid Deck and Path, while not stains are also good options for Pine decks.

  • Resene Waterborne Woodsman is not suitable for Pine decks.

Key accessories - essential to complete the job

  • Resene Moss & Mould Killer (for old and weathered decking)
  • Resene Timber and Deck Wash
  • 63mm-88mm PAL Premier Oval or Supra brush
  • Deck Application Pad and handle and roller tray (if needed)
  • Painter’s gloves
  • Sandpaper – 120-150 grit garnet to remove markings etc in timber
  • Stirrer
  • Turps for clean up

Add ons - to make job easier or quicker

  • Resene Paint pot (for decanting into)
  • PAL No.5 (mohair) roller sleeve, tray and handle (an alternative to brushing and/or Deck Pad)
  • Hand cleaner

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