Resene Popular Paint Systems – exterior timber: 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.
Select the timber surface you will be painting from the list below to view how to prepare and finish the surface.
Preparation & finishing flowcharts
Note: Refer to the PDF flowchart for a visual of the steps below:
Treat moss and mould with Resene Moss & Mould Killer
Wash and scrub using Resene Paint Prep and Housewash
Sand any flaking paint using 120-150 grit zinc sterate sandpaper
Spot prime using Resene Quick Dry Primer
Fill any holes and gaps, lightly sand filled areas with 220 grit sandpaper and reprime with Resene Quick Dry Primer
Resene Hi-Glo, Resene Sonyx 101 and Resene Lumbersider are formulated using costly adhesion promoters so they will adhere exceptionally well to aged paints, including old enamels without the need for extensive sanding of otherwise sound paints.
As an indication of their adhesion properties Resene Hi-Glo and Resene Sonyx 101 can be applied directly to weathered COLORSTEEL® (or COLORBOND®).
However any loosely bound contaminants or mould on the paint surface must be removed before painting or the paint will not bond to the old surface.
As exterior paint ages it will succumb to constant U.V. attack and will slowly deteriorate, with the top layer breaking down and ‘chalking’. The ‘chalk’ is mostly loosely bound pigments of TiO2 (Titanium Dioxide) for white paint.
'Chalk' and other contaminants need to be removed (dechalking) and the most effective way is to use Resene Paint Prep and Housewash and wash and scrub the same way you would a car – scrubbing flaking areas and washing paintwork in sound condition. It is also very effective at loosening and removing salt.
Any flaking paint should be scrubbed to remove the worst affected areas (a short bristled brush or Scotchbrite pad is ideal) and sanded using 120 to 150 grit zinc sterate sandpaper ensuring the edges are feathered before spot priming using Resene Quick Dry Primer.
After sanding, prime the same day as night time dew will creep under the freshly sanded paintwork and the edges will curl and lift – plan the prep work so that this is achieved.