Our white trims look more yellow than anything after just a few years. What do I need to do to stop them from yellowing again when I repaint?
Yellowing will occur over time when an oil-based enamel paint has been used, the less natural light the surface is exposed to the quicker the paint will begin to change colour and yellow.
A common question which is asked when undertaking any paint project and the answer will depend on a number of factors. Most cases we recommend sanding as best practice and a good habit to get into especially if the paint is flaking, peeling or cracking to remove any loose bits of paint. Giving the area a good sand will mean you can apply a normal primer like Dulux 1-Step or Berger Triple Prep in either oil-based or acrylic for the undercoat.
If the surface you’re wanting to paint is made of a different substrate like plastic, metal, wood, plasterboard or has an enamel topcoat (as your trims do) then we recommend using a high adhesion oil-based primer like Zinsser Smart Prime or Dulux Precision Maximum Strength as they adhere to multiple surfaces and will provide the perfect base for the top-coat and require little to no sanding.
A handy tip and good way to check whether or not the top coat is painted with an oil-based paint or water-based paint, is to simply dab a bit of mentholated spirts on an old rag and gentle rub against the painted surface, if residue starts to appear that means it’s been painted using a water-based paint, if nothing comes off then its oil-based paint that has been used.
Another frequently asked question which will again depend on a range of factors including what product is already painted on the surface, what kind of traffic does the area receive, if you’re painting interior or exterior, how much natural UV light does the area get, just to name a few. For door or window trims that already have an oil-based enamel top coat we would recommend using one coat of oil-based primer, then apply two coats of a water-based enamel like Dulux Aquanamel or Berger Water-Based Enamel for the top coat, both of these water-based products will do the trick to avoid yellowing and stay white for years to come.
In majority of situations we would recommend using water-based acrylic paint be used as the top coat as it will ultimately last longer, look better, is easier to apply, is more chip resistant, non-yellowing, flexible, low maintenance, low odour, quick drying and overall the more popular choice for retail customers.
Hope this information helps, as always, if you are tackling any type of paint project you should always chat with our expert staff at your nearest Inspirations Paint store to make sure you get the right products and tools so you can get the job done right the first time.
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