As a Decorator John, I must disagree. Paint is paint the process of Painting is what makes the difference, if you use the correct product and prepare properly, with the rite product the job is good. Many of the problems we encounter is really through no fault of our own, we may have the rite product but we can’t be sure of what the previous owner/occupant used, most modern paints are designed as though the surface your painting is brand new in the case of painting woodwork internally or externally.
An example of this is: if you purchased 10 year guaranteed Dulux weathersheild too paint your walls outside because you do like the sound of the guarantee and it began too flake in around 4-6 years you would have a good rite too complain, but if it’s on top of some unknown previous paint, forget it, you’ll lose, as the blame would be towards the surface you have applied it too.
Even if it was in good order before you applied your weathshield as you may have not liked the previous colour.
The products are out there, that do an excellent job if we use them correctly & prepare correctly.
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