![]() ![]() ![]() I've read people that have used a 50/50 ratio or 70/30 and have had problems with paint peeling or flaked. I've never painted skimmed walls before but since removing the mist coat I can see a few problems that might have caused the mist coat to crack and not adhere to the plaster.ġ, When doing the mist coat you could see stains in the plaster in places (Maybe pva mixed in plaster).Ģ, Plaster is so thin so maybe pva is reacting when mist coat soaked in.ģ, One wall looks shiny and after sanding with 120 grit the wall still feels very smooth and the pours of the plaster looks very closed. For old work, the treatment shall be with one or more coats as found necessary to get a uniform shade.I'm removing a failed mist coat back to bare plaster and I want to buy a primer to seal the plaster as I've read so many people are having problems with paint peeling/cracking for whatever reason so I thought about buying a plaster sealer but which one should I buy so I can use dulux retail matt.For new work, the surface shall be treated with three or more coats of waterproof cement paint as found necessary to get a uniform shade.Before the application of the second or subsequent coats, the surface of the previous coat shall not be wetted.The second coat of cement paint shall be applied after the first coat has been set for at least 24 hours.The completed surface shall be watered after the day’s work.It shall be applied on the surface, which is on the shady side of the building so that the direct heat of the sun on the surface is avoided.The solution shall be kept well stirred during the period of application.The prepared cement paint shall be applied on the clean and wetted surface with brushes or spraying machine.The lids of cement paint drums shall be kept tightly closed when not in use, as by exposure to atmosphere the cement paint rapidly sets due to its hygroscopic qualities.The second stage shall comprise of adding further one part of water to the mix and stirring thoroughly to obtain a liquid of workable and uniform consistency.The first stage shall comprise of 2 parts of cement paint of one part of water stirred thoroughly and allowed to stand for 5 minutes.Cement paint shall be mixed with water in two stages.Cement paint shall be mixed in the quantities as can be used up within an hour of its mixing as otherwise the mixture will set and thicken, affecting flow and finish.No hair marks and cloggings from the brush and paint puddles respectively in the corners of panels, the surface of the paint, and angles of moldings, etc.Each coat except the last coat shall be lightly rubbed down with sandpaper or fine pumice stone and cleaned off dust before the next coat is painted.Each coat shall be allowed to dry out thoroughly and rubbed smooth before the next coat is applied.Spraying should be done when dry condition prevails.Suitable thinner shall be added into the paint by skilled and experienced workers.Spray machine used shall be of the high-pressure type, or a low-pressure type, depending on the nature and location of work where the painting is to be carried out. Where so stipulated, the painting shall be done by spraying. ![]() The full process of crossing and laying off will constitute one coat. In the painting process, no brush marks shall be left after the laying off is finished.The crossing and laying off is brushing the surface hard for the first time and then brushing alternately in the opposite direction for multiple times and finally brushing lightly in a direction at right angles with paint.The paint shall be laid on smoothly and evenly by means of crossing and laying off.At the time of application, the paint shall be continuously stirred in the smaller containers so that its consistency is kept uniform. Before pouring the paint into smaller containers for use, the paint shall be stirred thoroughly and poured into smaller, manageable containers.Application of Paint (Paints, Oils, and Varnishers) The painting of the external surface should not be done in adverse weather conditions like hail storm and dust storm.Ģ.The prepared surface shall have received the approval of the engineer after inspection before painting is commenced.The rooms and the entire building shall be swept out and cleaned up in advance.All rust, dirt, scales, smoke splashes, mortar droppings, and grease shall the thoroughly removed before painting is started.The surface shall be adequately cleaned and dusted off.Procedure of Painting a Plastered Surface 1. ![]()
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