When should a brush and when should a roller be used for painting?
In general, it is easier and faster to work with a roller on the wide surfaces (walls). Brush is always needed at the corners, wooden surfaces such as doors, windows etc. If we are to generalize; synthetic brushes can be used for water based paints, natural bristle brushes for oil paints, long pileous rollers for creating rough and decorative surfaces, very short pileous rollers for smooth surfaces.
How should the walls be prepared?
Preliminary surface preparation is very important for the best results. In order to achieve an easy and long-lasting painting, the old paint and paper scraps should be removed off the surface, then the surface should be sanded and the dust should be wiped. Small cracks and holes should be filled with an appropriate putty and then primer should be applied on the whole surface. Paint can be applied after the primer dries. .
What is the difference of result between the water based and solvent based paint after application?
Solvent based paint form a thick film layer and minimizes breathing of the wall. It is just the opposite for the water based paint. Solvent based paint has shinier appearance and leaves paint smell after painting for a short time. Water based is smell-free.
How should the left over paint be preserved?
As based on the paint left over; it is kept by adding water, if the paint is water based and by adding solvent if it is solvent based (so that the contact of the paint in the container with air is interrupted.
Does ambient temperature has any effect on the paint application?
The temperature is required to be above +5 ºC, without rain and wind specifically for the paintings carried out outdoors. In the indoor areas, the state of the environment can cause later or earlier drying of the paint.
What could be the results of thinning the paint more than the given proportions?
The coverage of the paint and the adhesion capability on the surface is reduced. This results in the reduction of the required protection and decorative function of the paint
Why is a primer used?
Primer should definitely be applied on damaged and old surfaces as well as newly plastered surfaces. This application provides strengthening of the surface and better adhesion of the paint film to be applied. It increases the protectiveness by being absorbed by the capillary cracks on the surface and decreases the quantity of the paint to be applied over it.
Why is plaster used?
The only purpose of using plaster is to smoothen the surface.
what should be taken into consideration while painting the metal surfaces?
Metal surfaces get into reaction with the oxygen in the air and corrode after a while as a result of oxidation-reduction reaction. As a result of this reaction which is called rusting the paint film falls into pieces. In order to avoid this, the anti-corroding primer should be applied as 2 coats on such metal surfaces in order to break the contact with oxygen. Afterwards, finishing synthetic paint should be applied on the surface with primer. Synthetic painting is not applied to galvanize, aluminum and copper surfaces; adhesion problems occur if it is applied.
What is enamel?
It is the water or oil based, stainproof and washable finishing application material, which forms a smooth and hard surface. Although it is very glossy in general, there are also matt ones optionally
Is it more appropriate to use natural bristle brush or synthetic bristle brush?
It is closely related to the type of paint you use. Both types can be used in oil based paints. Synthetic bristle brushes should only be used in latex or acrylic paints. (the water in latex or acrylic paint take the oil in the natural bristles and consequently the use of natural bristles get quite difficult.)
Is there any paint to prevent the moisture leaking from the ground walls?
The products that contain Portland cement can be used as waterproofing elements on the walls. However, abundant moisture leakage may require taking different measures such as formation of a vapor-preventive block outside the walls.
What is the best exterior wall paint; acrylic or alkyd?
Acrylic finishing is the best option in order to prevent color loss and provide flexibility. However, it is very important to apply an oil based preliminary coat before the application of the acrylic top coat on the surfaces that may bleed.
Can painting be performed in cold weather?
Many latex or acrylic paints should not be applied when the temperature falls below 10 °C. Alkyd/oil based paint can be applied at temperatures down to 5 °C.
Why is it not recommended to paint under direct sunlight?
Paints are required to remain wet for some time after application in order to enable smooth processing and adhesion. The heat of the direct sunlight causes the outermost layer of the paint dry before complete maturity. This causes bubbles on the paint.
What type of coating is appropriate for the wooden surfaces such as fences and decks?
Many decks are produced of pressurized wood. Stains are seen on these since many people walk on horizontal surfaces. However, painting procedure is almost arbitrary for vertical surfaces or the fences. Before starting painting, water absorption capacity of the wood should be checked by spraying water on it. If water remains as droplets on the surface, then the paint shall not penetrate into the wood. If the surface is new, the same procedure should be repeated after 30 days. If the surface is not new, it should be cleaned well and be prepared for the painting procedure.
What type of sponge should be used in decorative paint applications?
Natural sea sponges create a fantastic appearance after the application. However, this cannot be said for the artificial sponges.
What can be done for the stains and dirt forming on the newly painted walls?
It is required to wait for at least two weeks (however, four weeks is much better) in order to clean newly applied paint. The wall can be wiped by using a soft cloth or sponge, with the soap water. Traces may occur on the walls if too much watery cleaning is applied.
How should minor deformations on the painted surfaces be intervened?
If best results are desired in such minor interventions, the methods same with those of original paint applications should be used. Maximum attention should be paid in order to use the original paint. A very thin layer should be applied by thinning 25-50%. It shall be more appropriate to make the application at the moisture and temperature values same with those of the original painting.
What is the significance of the second coat in exterior wall paint applications?
Second coat paint naturally thickens the paint layer and this increases the resistance of the paint against the external factors.
How can the overlapping marks be prevented while painting?
Paint is applied on small areas and the drying of the paint on the surface is prevented when new paint is being taken to the brush, and consequently, this prevents the formation of marks.
what are the drawbacks of paint application at very high temperatures?
At very high temperatures, paint dries without adhering onto and penetrating into the surface. This results in peeling and bubbling of the paint.
Which colors fade slower on the exterior walls surfaces?
First of all, all the paints used on the exterior surfaces fade by time. However, this fading rate differs from color to color and from paint to paint. The organic colors such as blue and green tend to fade faster when compared to the inorganic colors such as brown and yellow.
Why do cracks appear on a newly painted surface?
The main reason of such cracks is the application of paint in layers thicker than required. The topcoat dries faster and it takes more time for the undercoats to dry. When the undercoats dry, they shrink and this causes cracks in the topcoat. Moreover, if the painted surface was not cleaned well, this can also constitute a reason for cracks.
