Staining weathered or previously stained timber

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

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

2. Thoroughly scrub with Resene Timber and Deck Wash. Use a short bristled scrubbing brush. Rinse thoroughly.

3. Finish options:

   • Apply 2-3 coats of Resene Waterborne Woodsman (3 coats if using Resene Cool Colour).
   • Alternatively, apply 2-3 coats of solventborne Resene Woodsman.

Restaining

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

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

2. Thoroughly scrub with Resene Timber and Deck Wash. Use a short bristled scrubbing brush. Rinse thoroughly.

3. Finish options:

   • If reapplying the same colour: apply 1-2 coats of either Resene Waterborne Woodsman or solventborne Resene Woodsman.
     • Also consider using Resene Waterborne Woodsman Cool Colour.
        
   • If surface has weathered badly or if changing colour to a darker stain: apply 2-3 coats of either Resene Waterborne Woodsman or solventborne Resene Woodsman.

Notes:

• Mould and occasionally moss will be present on both unstained and previously stained but weathered timber and will need to be killed using Resene Moss & Mould Killer. The residue and other contaminants will need to be scrubbed and washed from the surface using Resene Timber and Deck Wash or Resene Paint Prep and Housewash.

  
  Deck waterblasted

• Do not waterblast – not only is it likely to be slower and less effective than scrubbing using Resene Timber and Deck Wash it can gouge and badly damage the timber, especially soft woods such as Cedar. Waterblasting can be useful for removing coatings including old clear finishes from hardwoods or for cleaning Kwila decking. The adjoining photo shows the damage a waterblaster has caused these Cedar boards. Compare this to similar boards cleaned using Resene Timber and Deck Wash on page 3.

• In most cases older, well weathered penetrating stains simply need treating for moss and mould followed by thorough scrubbing before applying further coats. If the surface is badly deteriorated it should be sanded with 100-150 grit garnet sandpaper to remove the worst detritus.

• If the stain is peeling and/or flaking it is likely to be a surface forming stain and unfortunately this will probably need to be removed before applying a penetrating stain like Resene Woodsman. If it is in sound condition a further coat of the same can be used – however we do not sell (or recommend) surface forming stains.

• It is not possible to lighten a stain (unless you remove the previous coating or paint) so subsequent coats need to be either the same colour or darker. Always try a sample or do a test patch when changing the stain colour.

• Dark stains are also recommended to help disguise discoloured areas common in aged, weathered timber – particularly Cedar. However there is the increased likelihood that the darker colour will cause some timber movement (warping, cupping etc). Use a Resene Cool Colour option if available – this will help but will not completely stop heat related stress on timber.

• Resene Waterborne Woodsman is very tolerant of poorly prepared and weathered timber, which is why we recommend it for old Cedar in particular.

Key accessories - essential to complete the job

• Resene Moss & Mould Killer
• Resene Timber and Deck Wash
• PAL 63mm-88mm PAL Legend brush for Resene Waterborne Woodsman or PAL Premier Oval brush for solventborne Resene Woodsman
• Resene Paint pot (for decanting into)
• Masking tape
• Painter’s gloves
• Sandpaper – 120-150 grit garnet to arris sharp edges
• Stirrer

Add ons - to make job easier or quicker

• Turps for solventborne Resene Woodsman
• Hand cleaner – Resene Woodsman has tremendous adhesion and can be difficult to clean off skin (much more so than paint)
• Short bristle scrubbing brush
• A 180mm No.1 or No.2 Roller for Waterborne Woodsman for rough sawn fence palings or No.1 Nook and Cranny roller
• Drop sheet

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