Determining if the existing paint finish needs to stripped off before repainting.
It is sad but true that we all deteriorate and weaken with age and the same goes for paint systems. The first coat of paint that is applied to a substrate will inevitably become the oldest as new repaints are applied on top of it. Eventually that old first coat will just become too tired and simply let go and, when it goes, everything above it goes as well.
Picking just exactly when built-up paint systems require an expensive total removal is a black art because failure of the underlying system can be catastrophic with few early clues. An old original primer might be coping under the burden of several repaints but the additional stess of applying yet another repaint could be the straw that breaks the camel's back.
The old primer lets go of the substrate in a series of blisters that go right back to the original surface. The fault is not the latest topcoat, but that the old primer can no longer perform.
The presence of these blisters is a sure sign that total removal is necessary as patching up is only a palliative. There may, however, only be a constrained area that needs this treatment - areas that have had the most exposure to the weather.
The need for total removal can sometimes be predicted by checking the adhesion of the system with special adhesive tapes. In other cases the problem may only become known after the topcoat has been applied and left to weather.
Resene Paint and Decorating Problems Solver
Learn more about typical painting problems and situations you may find when decorating...
Can't find what you're looking for? Ask us!
We would love to hear from you if you wish to use Resene's images, information and ideas for social medial, blogs, newsletters and other media use. Please email email@example.com and let us know what you need, what it is for and how Resene will be acknowledged as the source of the content. We are happy to assist with most requests.
Colours shown on this website are a representation only. Please refer to the actual paint or product sample. Resene colour charts, testpots and samples are available for ordering online. See measurements/conversions for more details on how electronic colour values are achieved.