Common paint problems
Cracking and
Flaking:
Early on this problem occurs as
hairline cracks; later peeling and flaking of chips occurs.
| Causes: |
- Use of lower quality paint
- Over thinning of paint
- Poor surface preparation
- Painting under cool or windy conditions making the paint dry
too fast.
|
| Solution: |
If cracking does not go down to the
substrate, sand to feather the edges of the cracks. Prime any bare
spots, and seal the surface with the appropriate Bristol undercoat,
to achieve a smooth surface for repainting.
If cracking goes all the way down to the substrate remove all the
paint by scraping and sanding and / or the use of a heat gun then
prime and repaint.
|
Mould:
| Causes: |
- Forms on areas that tend to be damp or receive little direct
sunlight.
- Use of low quality paint that has insufficient amount of
fungicide.
- Painting over a surface where mould has not been removed.
|
| Solution: |
Remove mould with a solution of water
and household bleach (one part bleach and three parts water.)
|
Peeling:
This is a loss of paint due to poor
adhesion.
| Causes: |
- Inadequate surface preparation.
- Use of lower quality paint
- Applying oil based paint over a wet surface
|
| Solution: |
Prepare surface by removing all paint
with a scraper or wire brush, sand rough surfaces, prime bare wood
and repaint.
|
Wrinkling:
Occurs when the paint forms a
"skin".
| Causes: |
- Paint applied to thickly
- Painting a hot surface or in hot weather
- Applying a topcoat to an insufficiently dried first coat.
- Painting over a contaminated surface.
|
| Solution: |
scrape and sand to remove wrinkled
coat. Repaint with the appropriate Bristol finish. Make sure the
first coat or primer is dry before applying the topcoat. When
painting in extremely hot, cool or damp conditions allow extra time
for paint to dry completely.
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