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Causes:
- Not enough coat
- Too thin coat
- Colour of the newly applied coat is much lighter than the original finish
Solution:
- Refer to the suggested number of coats when painting
- Before painting, check the back panels of the cans for proper thinning ratio and thin the paints according to the instructions. Make sure to stir well before application
- If the colour contrast of the new and existing paint is high, it is advised to apply one or two more coats to achieve better result
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Causes:
- The growth of mould is due to the humid living environment
Solution:
- If there is mould grown:
- Use diluted bleach (1 part of bleach to10 parts of water) to cure
- To prevent growth of mould:
- Choose to paint with a mould resistant painting system, i.e. use Dulux Alkali Resisting Wall Sealer (A931-18177) with Dulux Supreme Emulsion Paint (A928 or A918) as a topcoat
- Try to avoid painting in humid environment
(especially relative humidity is higher than 85%)
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Causes:
- Brush marks will appear if the second coat is applied when the first coat is not thoroughly dried
- Paints too thick
Solution:
- When painting, paint evenly and lightly in the same direction, wait until the first coat dry thoroughly before applying the second coat
- Before painting, check the back panels of the cans for proper thinning ratio and thin the paints according to the instructions
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Causes:
- Over application
- Paint over thinned
- Uneven application to broad flat surfaces
- Failure to join up 'wet edges'
Solution:
- Avoid over application, increase the number of coats when necessary
- Check the back panels of the cans for proper thinning ratio and thin the paints according to the instructions
- When painting broad flat areas, work systematically and brush each section into the next using vertical strokes
- Wait until the paint is dried thoroughly, sand off all the affected areas with dry or wet abrasive paper and little detergent. Rinse thoroughly with clean water and allow to dry before applying another coat of the same finish
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Causes:
- Wearing away of the paint coating
- Accumulation of salt-like granules due to alkali erosion of paint film
- Interior paint is mistakenly used for exterior
Solution:
- Powdery or chalky old paintwork can be removed by simply washing down. Repaint with the same finish after the surface is completely dried
- Use Dulux Alkali Resisting Wall Sealer (A579-15054) to prime the surface before applying the top coat to avoid alkali erosion
- Use suitable exterior emulsion paints for exterior wall top coat, such as Dulux Weathershield Exterior Wall Finish (A915)
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Causes:
- The paint has been applied over dirt, oil, grease or previously gloss painted surface, in the case of conventional emulsion paints
- The adhesiveness was affected when the surface coat did not match with the primer
Solution:
- Small area:
Scrape back the flaking paints and the area near by, prime with a suitable primer followed with repaint
- Large area:
Abrade the whole surface with abrasive paper. Repaint with an appropriate ICI Dulux emulsion paint system
- Read the instructions on the cans carefully, choose compatible primers and top coats
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Causes:
- Over application and when paints are applied at high temperatures or under direct sun light, the paint surface will dry quicker then the underneath coat and result in shriveling or wrinkling
Solution:
- Rub down surfaces using 'wet or dry' abrasive paper and warm water. Rinse thoroughly with clean water and allow to dry before applying another coat of the same finish. Check the back panels of the cans for proper thinning ratio and thin the paints according to the instructions. Avoid over application, increase number of coats when necessary
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