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Rolexianer10 Feb 2021 21:54I want to repaint a latex paint applied to the ceiling about 55 years ago with latex paint again.
My local painter suggested applying a primer first, then a coat of latex paint, which should be sufficient since the original paint layer is still in good condition.
I already bought the latex paint myself, of course from an expensive but competent specialist retailer nearby, because they offer the best materials and advice.
Unfortunately, the specialist retailer disagrees with my painter, and I have received two different answers over the phone from the retailer (thanks to the pandemic):
1. No primer should be used; instead, apply two coats of latex paint. The first coat will smear, but the second coat will make the ceiling look good.
2. A single coat of latex paint without primer is enough.
I’m quite uncertain, especially since online DIY guides recommend “degreasing with alcohol, roughening by sanding, and, like my painter, consider primer necessary.” My painter, on the other hand, thinks degreasing and sanding are unnecessary.
How can I apply the new latex paint permanently over the old one?
My local painter suggested applying a primer first, then a coat of latex paint, which should be sufficient since the original paint layer is still in good condition.
I already bought the latex paint myself, of course from an expensive but competent specialist retailer nearby, because they offer the best materials and advice.
Unfortunately, the specialist retailer disagrees with my painter, and I have received two different answers over the phone from the retailer (thanks to the pandemic):
1. No primer should be used; instead, apply two coats of latex paint. The first coat will smear, but the second coat will make the ceiling look good.
2. A single coat of latex paint without primer is enough.
I’m quite uncertain, especially since online DIY guides recommend “degreasing with alcohol, roughening by sanding, and, like my painter, consider primer necessary.” My painter, on the other hand, thinks degreasing and sanding are unnecessary.
How can I apply the new latex paint permanently over the old one?
Primer is an aqueous acrylic dispersion that penetrates absorbent substrates to stabilize them and ensure an even paint finish. Latex is a sealing paint that does not absorb. It becomes absorbent after sanding; old latex that has been sanded and treated with primer then provides a good adhesion base for a solid new coat. Since no one can be certain whether fats have settled on the old paint over the course of 55 years, you should first degrease the surface, for which alcohol can be used. Then, roughen the surface with a sanding machine, vacuum the dust, apply primer with a garden sprayer, and finally paint.
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Rolexianer11 Feb 2021 00:09Thank you very much for your description of the royal road!
Wiping the ceiling with rubbing alcohol is manageable with a flat mop.
Before using the sanding machine (which sanding disc would be suitable?) on 70 m² (750 sq ft) overhead, I have great respect for the task. Is there a more elegant, less strenuous solution known?
P.S.: I am surprised by both statements from the specialist dealer, especially since they had honestly earned my trust over many years...
Wiping the ceiling with rubbing alcohol is manageable with a flat mop.
Before using the sanding machine (which sanding disc would be suitable?) on 70 m² (750 sq ft) overhead, I have great respect for the task. Is there a more elegant, less strenuous solution known?
P.S.: I am surprised by both statements from the specialist dealer, especially since they had honestly earned my trust over many years...
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HilfeHilfe11 Feb 2021 06:32Not everyone can handle latex. We once had a latex paint near an open fireplace.
I received four statements.
I received four statements.
For sanding ceilings and walls, a drywall sander (also known as a "pole sander" or "sanding giraffe") is used. You might want to look it up online. Some hardware stores or rental centers offer these tools. For about 70 m² (750 sq ft) overhead, using a standard random orbital sander on a ladder is not very practical.
Rolexianer schrieb:
My local painter wanted to apply primer, then a coat of latex paint, which should be enough since the original paintwork still looks good. Why question the expert opinion of the professional?
Let them do it.
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