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Yes, otherwise you will seal in moisture causing potential rot and mildew.
Open celled foam must be sealed prior to painting. The seal is a simple mixture of white glue thinned with water and brushed on.
I believe that you prime than paint than seal. It depends on the paint you are using and what you are painting A lot of the exterior paints used today don't require any undercoat. However if you are painting over a previously painted surface you must keep preparation in mind.
Cement can wick moisture from outside that will cause your paint to peel off. Look for a primer that will seal it first, then paint it.
Putty should not be allowed to dry completely. If it does, then it will become brittle and may shrink and crack. The main purpose of putty is to form a seal between the glass and the wooden window frame. The putty should be painted to seal in the linseed oil which keeps it pliable. A film of hard putty on the surface forms after 2 to 3 weeks (weather dependent) and then the painting should be carried out to stop any further drying of the putty.
Yes
seal the deal
Yes, otherwise you will seal in moisture causing potential rot and mildew.
Use refractory cement.... see above
Open celled foam must be sealed prior to painting. The seal is a simple mixture of white glue thinned with water and brushed on.
Because it will avoid problems withold oil-based paint (you ABSOLUTELY need a primer over an oil-based paint before painting with water-based/acrylic pain)patches made of different material (patches of plaster for example) that would react differently from other parts of the wallbare surfaces (new walls) which won't give good adherencecolour changes (if painting over walls of different colours, the result will look different with the first layer(s) of paint. The primer can help)
Calligraphy, painting, and seal carving
it is not necessary but it will increase the life and prevents corrosion
I believe that you prime than paint than seal. It depends on the paint you are using and what you are painting A lot of the exterior paints used today don't require any undercoat. However if you are painting over a previously painted surface you must keep preparation in mind.
When I heard this I just assumed people were saying cement to mean they were using concrete. In my experience most people do not know the difference.
Cement can wick moisture from outside that will cause your paint to peel off. Look for a primer that will seal it first, then paint it.
Depending on your homes construction material,sealant may be applied to the exterior ti seal walls.