Dealing with acrylic over oil paint?
murmur
I've purchased a house in which the previous owners have recently used
acrylic paint over oil paint. I say this because the acrylic paint can
be scraped off very easily (with a fingernail), and it appears to be oil
paint underneath.
I would like to repaint with a latex. Do I need to scrape off all the
acrylic, or can I use a primer over everything, then proceed with the
new paint job? (If so, which primer?). Any other advise would be
appreciated.
Thank you.
dadiOH
"murmur" <mur...@NOSPAMMnyc.rr.com> wrote in message
news:tQYGe.4439$Ow4.1...@twister.nyc.rr.com...
"Acrylic" paint *is* latex.
--
dadiOH
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murmur
dadiOH wrote:
>
>
> "murmur" <mur...@NOSPAMMnyc.rr.com> wrote in message
> news:tQYGe.4439$Ow4.1...@twister.nyc.rr.com...
>
>>Hi,
>>
>>I've purchased a house in which the previous owners have recently used
>>acrylic paint over oil paint. I say this because the acrylic paint can
>>be scraped off very easily (with a fingernail), and it appears to be
>
> oil
>
>>paint underneath.
>>
>>I would like to repaint with a latex. Do I need to scrape off all the
>>acrylic, or can I use a primer over everything, then proceed with the
>>new paint job? (If so, which primer?). Any other advise would be
>>appreciated.
>
>
> "Acrylic" paint *is* latex.
>
> --
> dadiOH
Yes, I'm aware of that. The question still stands: do I need to scrape
it all off, or is there a sealer which I can use over the
acrylic-over-oil combination which is currently there? I assume if I
just paint over the acrylic, it will not bond very well, as the acrylic
itself is not bonding well to the oil.
Todd H.
> "murmur" <mur...@NOSPAMMnyc.rr.com> wrote in message
> news:tQYGe.4439$Ow4.1...@twister.nyc.rr.com...
> > Hi,
> >
> > I've purchased a house in which the previous owners have recently used
> > acrylic paint over oil paint. I say this because the acrylic paint can
> > be scraped off very easily (with a fingernail), and it appears to be
> oil
> > paint underneath.
> >
> > I would like to repaint with a latex. Do I need to scrape off all the
> > acrylic, or can I use a primer over everything, then proceed with the
> > new paint job? (If so, which primer?). Any other advise would be
> > appreciated.
>
> "Acrylic" paint *is* latex.
His post never indicated anything otherwise. Ah, usenet. 8-)
To the OP, I googled "latex over oil-based" and came up with this
info among many others
http://www.dutchboy.com/faq/faq.asp?category=interior&answer=11
Can I apply latex paint over oil based paint?
Yes. Be sure to prepare the surface properly before
painting. Oil-based paints should be sanded to a flat finish
before painting. After rinsing, apply Dutch Boy. oil-based
primer and apply desired Dutch Boy. latex paint.
Best Regards,
--
Todd H.
http://www.toddh.net/
Ranieri
There's nothing inherently wrong with painting acrylic/latex over a sound
oil-based finish. The problem is that some oil finishes are prone to
chalking and if the chalking wasn't cleaned off before it was painted, you
don't get a good bond and you get that intercoat flaking that you're seeing.
Solution would be to remove everything that's loose (scrape, sand, etc.),
scrub the surface, allow to dry, prime as needed and paint.
John Willis
scribbled this interesting note:
The reason the existing paint is not bonded to the previous oil based
paint is improper prep work. Properly prepared, the combination you
describe will last a good, long while.
So far as I know, the only solution you will find is to remove the
flaking paint and properly prep the work to be painted.
I have to ask, what's wrong with an oil based paint on the wood work
in the home? Why not go back with a good, high quality oil based
paint?
--
John Willis
jdwill...@airmail.net
(Remove the Primes before e-mailing me)
Martin
"3rd eye" <3rd...@inyourface.com> wrote in message
news:s8tpe11ucffj36nk3...@4ax.com...
> Acrylic paint is _not_ latex.
> It is acrylic.
> Water based yes.
> There is a diffenence.
>
> I believe we've been over this before.
Missed the explanation. What is the difference?
Roger Taylor
No use just priming and painting, as this will have no effect on the bad
bond underneath, and your new paint will continue to flake off. Best
solution is the hardest - Use a wire brush, hand-held chisel, ice pick,
scraper, etc, and locate (there may be areas where the bond is ok) , then
scrape off loose acrylic paint using a combination of tools depending on
shape of trim or wall, then scrub and sand rough edges and exposed patches
of oil paint. Once this is roughed up, spot prime the exposed oil paint,
fill where necessary, reprime the dried filler, and repaint whole area using
acrylic or oil. I know it is a lot of effort, but likely the only way to
proceed to get a lasting paint job.
Ranieri
> I've never seen it indoors.
Me neither. I wonder if he's talking interior or exterior.
Norminn
dadiOH wrote:
>
>
> "murmur" <mur...@NOSPAMMnyc.rr.com> wrote in message
> news:tQYGe.4439$Ow4.1...@twister.nyc.rr.com...
>
>>Hi,
>>
>>I've purchased a house in which the previous owners have recently used
>>acrylic paint over oil paint. I say this because the acrylic paint can
>>be scraped off very easily (with a fingernail), and it appears to be
>
> oil
>
>>paint underneath.
>>
>>I would like to repaint with a latex. Do I need to scrape off all the
>>acrylic, or can I use a primer over everything, then proceed with the
>>new paint job? (If so, which primer?). Any other advise would be
>>appreciated.
>
>
> "Acrylic" paint *is* latex.
The reason I hate latex on trim and doors! I had the experience of
painting a neighbor's condo before we faced the situation in our own.
His old paint job was a nasty one, latex slopped on over food splatters
and fingerprints on old, hard enamel. I had no choice but to scrape,
pick and peel the latex because it could not be sanded. It came off in
large sheets from the doors.
When we did our own condo, thankfully only a vacation home for many
years so it had only one coat of paint in addition to the original, the
contractor said that if the latex was intact he would prime over it and
then paint. Hubby didn't want me peeling old paint for weeks and weeks,
so that is what we opted to do. We are old retired fuddy duddies, so
nobody is crashing into the woodwork and knocking the paint loose - the
latex wasn't chipped or dinged, so the primer and paint went on nice and
smoothe.
It is fine to use latex over oil if prepped and primed properly. I am a
fanatic about prepping, because I don't like to paint often.
murmur
sorry.....meant interior.
Martin
> I don't know.
>
> But a quick search found this.
> http://www.pcimag.com/CDA/ArticleInformation/coverstory/BNPCoverStoryItem/0,1848,133180,00.html
>
> It would appear I've been incorrect. Acrylic paints are latex.
> But latex paint doesn't necessarily mean they are acrylic.
>
OK, now you are correct on both counts. "Latex paints" is used rather
loosely for different kinds of paints as your reference implies. The
original ones were based on styrene-butadiene latex, but that gave way to
the acrylics because of their better outdoor stability and general
durability.
Chuck B.
dadiOH
"3rd eye" <3rd...@inyourface.com> wrote in message
news:b4cqe11icn8gcqmqh...@4ax.com...
> It would appear I've been incorrect. Acrylic paints are latex.
> But latex paint doesn't necessarily mean they are acrylic.
Bingo.
Susan Wingard
My painter spray painted up prepped windows. No scraping, no sanding. Now I am
a little unsure how to handle? I fired those painters, but I want to know how
the windows should be properly prepared from here? I am guessing that the new
paint will need to be removed in its entirety and then the windows scraped,
sanded primed properly before repaint? Additionally the painters painted my
shutters and doors with a paintbrush, semi gloss and strokes in every
different direction, so you can see the strokes in different directions. : (
There plan was to roll over the first coat and finish from there? I am afraid
the strokes will show? Any and all advice on how to handle this from here
would be greatly appreciated. Sincerely.
--
for full context, visit https://www.homeownershub.com/maintenance/dealing-with-acrylic-over-oil-paint-18207-.htm