Paint problem, help please

starlight09

Hello,
I've been painting with over 30 years, the length of time I've lived in this house. I've painted this room several times and never had a problem until now. I can't understand what has gone wrong, loads of bubbles have appeared in the ceiling, some large and some small which have burst, leaving a dirty colour. Can someone please help me with this.

GreeBo

Assuming the surface was dry when you started.. Then it's probably oil/dirt preventing proper paint adhesion.

How many coats did you apply?

starlight09

GreeBo wrote: »

Assuming the surface was dry when you started.. Then it's probably oil/dirt preventing proper paint adhesion.

How many coats did you apply?

I gave it two coats. I washed the ceiling, maybe I didn't wash it properly. Thanks for replying.

punisher5112

Is there smokers?
Is it the kitchen?

starlight09

punisher5112 wrote: »

Is there smokers?
Is it the kitchen?

No smokers, it's a spare bedroom.

punisher5112

starlight09 wrote: »

No smokers, it's a spare bedroom.

Wonder is it the previous paint as in was oil based used as now nearly all are water based.

Was it very old or hot when doing this and was dampness maybe an issue.

GreeBo

starlight09 wrote: »

I gave it two coats. I washed the ceiling, maybe I didn't wash it properly. Thanks for replying.

No worries.

Was it dry after you washed it?
How long did you leave between coats?
How long before bubbles appeared?

(sorry for the Spanish inquisition!)

starlight09

punisher5112 wrote: »

Wonder is it the previous paint as in was oil based used as now nearly all are water based.

Was it very old or hot when doing this and was dampness maybe an issue.

I've always used matt ceiling paint and the temperature in the house is the same everyday.

What do you suggest I do with it now, to try and get it looking respectable.

starlight09

GreeBo wrote: »

No worries.

Was it dry after you washed it?
How long did you leave between coats?
How long before bubbles appeared?

(sorry for the Spanish inquisition!)

No worries about the Spanish inquisition, your trying to help.
Yes it was well dry, it was washed a few weeks previously. The bubbles appeared about an hour after painting and there was a day between coats

GreeBo

starlight09 wrote: »

No worries about the Spanish inquisition, your trying to help.
Yes it was well dry, it was washed a few weeks previously. The bubbles appeared about an hour after painting and there was a day between coats

All above seems ok, so I would second the idea that maybe you have (unknowingly) moved from oil to water based?

Though to be honest I would expect it to do more than bubble, it would probably peel in large chunks taking the original paint with it.


All you can really do is scrape anything loose, sand and paint again.
If large chunks are coming off then it gets more difficult as you may need to fill and blend which is a pain in the ass.

starlight09

GreeBo wrote: »

All above seems ok, so I would second the idea that maybe you have (unknowingly) moved from oil to water based?

Though to be honest I would expect it to do more than bubble, it would probably peel in large chunks taking the original paint with it.


All you can really do is scrape anything loose, sand and paint again.
If large chunks are coming off then it gets more difficult as you may need to fill and blend which is a pain in the ass.

Ok, I've got some serious work to do.
I wonder would the brand of paint have anything to do with it. It wasn't my usual brand

starlight09

Would a coat of Anti condensation paint help?

GreeBo

starlight09 wrote: »

Would a coat of Anti condensation paint help?

I wouldnt have thought so, thats just to stop condensation forming on a finished ceiling when all is well.

punisher5112

What did you wash it with??

starlight09

punisher5112 wrote: »

What did you wash it with??

Warm water with a shot of Fairy Liquid.

punisher5112

starlight09 wrote: »

Warm water with a shot of Fairy Liquid.

Use sugar soap in future.... Much better.

I can't comment for sure but if and soap residue was left that could well be your issue.

I'd sand it before painting over.

starlight09

punisher5112 wrote: »

Use sugar soap in future.... Much better.

I can't comment for sure but if and soap residue was left that could well be your issue.

I'd sand it before painting over.

Thanks for all your help.

Banzai600

im no diy expert by any stretch, but when we get small lumps / dirt when painting, we use a stanley knife blade on its own - and just drag it along the area after its dried, the sharp edge removes blemishes, etc, and then touch up if needed. just hold the blade 70 degrees to the area and go gently, job done.

MAJJ

punisher5112 wrote: »

Use sugar soap in future.... Much better.

I can't comment for sure but if and soap residue was left that could well be your issue.

I'd sand it before painting over.

I was thinking the same , that what was used to wash may be the issue. I also use sugar soap.for my own DIY

punisher5112

Banzai600 wrote: »

im no diy expert by any stretch, but when we get small lumps / dirt when painting, we use a stanley knife blade on its own - and just drag it along the area after its dried, the sharp edge removes blemishes, etc, and then touch up if needed. just hold the blade 70 degrees to the area and go gently, job done.

These are bubbles though....

It's paint not actually bonding that's the issue.

Good tip though for what you say..

Banzai600

punisher5112 wrote: »

These are bubbles though....

It's paint not actually bonding that's the issue.

Good tip though for what you say..

no probs, good luck with it.

starlight09

Banzai600 wrote: »

im no diy expert by any stretch, but when we get small lumps / dirt when painting, we use a stanley knife blade on its own - and just drag it along the area after its dried, the sharp edge removes blemishes, etc, and then touch up if needed. just hold the blade 70 degrees to the area and go gently, job done.

Thank you for that tip, it's very helpful indeed.

dok_golf

You have contamination beneath the paint. could be anything. Sand the bajaysus out of it and coat with an adhesion primer ( something like fleetwood Pure Grip). then paint as per normal.

starlight09

dok_golf wrote: »

You have contamination beneath the paint. could be anything. Sand the bajaysus out of it and coat with an adhesion primer ( something like fleetwood Pure Grip). then paint as per normal.

Thank you for replying. I have never heard of Fleetwood Pure Grip, I must look it up.