What has Caused this Door To Peel?

Grzyb · 18 Feb 2017

Hi All,

SWMBO always does the Painting, she apparently finds it therapeutic....

Anyway, last week she Painted one of the Doors in the Downstairs Toilet & a few Days later it started to Peel...See Enclosed Pics....

Anyone care to speculate what has occurred??

TIA for any reply's....

sparkwright · 18 Feb 2017

YES.

I would say she hadn't sanded the surface first.

New paint will not adhere properly to an old glossed surface.

Old glossed surfaces must be sanded all over before applying new paint.

You are very lucky the new paint has come off as easily as it has. Scrape the remaining paint off, and sand down the surface thoroughly and evenly. A quick sand down isn't really good enough if you want to avoid this kind of thing happening again. Any bare bits of wood should be primed. Undercoat the surface. Any dark areas may require more undercoats. It's recommended, though not essential, that a light sanding between coats will eliminate any blemishes in the undercoat. When satisfied with the undercoat, apply topcoat.

Thorough dusting after all sanding is vital.

Hopefully she will find sanding therapeutic too.

Grzyb · 18 Feb 2017

Hi sparkwright

Thanks for the Tips...

It's very strange that the Skirting Boards & another Door was painted at the same time, But they are OK, I've checked for Peeling....

However, She Did say that the Tin of Paint "Ran Out" after she'd Painted the said Door & She had to go out & Buy another Tin....

The Paint in Question was left over from a Job last Year in the Garage...Can Paint "Go Off"?

sparkwright · 18 Feb 2017

Wouldn't expect paint to 'go off' after only a year or so - but anything is possible.

Was the door in question rubbed down before painting?

What make was the old leftover can?

Grzyb · 18 Feb 2017

sparkwright said:
Wouldn't expect paint to 'go off' after only a year or so - but anything is possible.

Was the door in question rubbed down before painting?

What make was the old leftover can?

No Nothing was rubbed-down...New paint was the same as the Old Tin....

sparkwright · 18 Feb 2017

Clearly there is something up with old tin of paint, because, as you say, the new tin of paint hasn't peeled.

Is the paint she applied oil-based or water-based? And who is the manufacturer, and what's it called?

Where was the older tin of paint stored?

Robbie uk · 18 Feb 2017

Too many coats of gloss on gloss without an undercoat in between and lack or rubbing down can cause this.

Diver Fred · 19 Feb 2017

Is your SO an enthusiastic user of a dusting aid? e.g. 'Mr Sheen' or similar...
If so then that is the problem; seen it recently on woodwork that I've refreshed the decorating on.

As other have said it's hard work with rubbing down with sandpaper; if the door is already painted then you have to get the old paint off, if it isn't painted then the rubbing down should get much of the surface off; in either case once rubbed down wipe it down with a cloth damped with white spirit. Allow to dry before undercoating and gloss.

Chri5 · 21 Feb 2017

Likely a surface layer of polish or cleaner, most will spray and wipe something on a door.

Maybe she should have keyed the surface and washed back with sugar soap first?

Grzyb · 28 Feb 2017

Hi Guys,

So I bought myself a Sander & Sanded Down the Doorway which had "peeled" Painted with Dulux Professional Undercoat, which is Oil-Based.....

Do I need to use Oil-Based Gloss? Or Can I use Water-Based Gloss?

Robbie uk · 28 Feb 2017

You can use water based gloss over oil based undercoat. Sand it down well first and after your first coat of gloss gently sand that as well prior to putting your second coat on.

sparkwright · 28 Feb 2017

You would presumably need to use the same gloss as the other woodwork so it matches.

As said, either will be ok on top of the oil-based undercoat.

You don't have to apply two coats of gloss. You can apply two undercoats and one gloss.

The reason I mention this is if you were to use an oil-based gloss, you may struggle waiting for the first coat of gloss to harden sufficiently before the second coat of gloss. Undercoat does tend to dry and harden quicker.

Your post suggests you want to use a water-based gloss.

(Back to your original problem, water-based paint applied on top of oil-based gloss that hadn't been rubbed down would certainly peel off very easily.)

Grzyb · 28 Feb 2017

sparkwright said:
You would presumably need to use the same gloss as the other woodwork so it matches.

As said, either will be ok on top of the oil-based undercoat.

You don't have to apply two coats of gloss. You can apply two undercoats and one gloss.

The reason I mention this is if you were to use an oil-based gloss, you may struggle waiting for the first coat of gloss to harden sufficiently before the second coat of gloss. Undercoat does tend to dry and harden quicker.

Your post suggests you want to use a water-based gloss.

(Back to your original problem, water-based paint applied on top of oil-based gloss that hadn't been rubbed down would certainly peel off very easily.)

Thanks for everyone's feedback....

Yes, I've already bought/used the Water-Based Gloss, in other places, so for Continuity, it would make sense....In hindsight, whilst Preparing & Sanding Down the Door Frame today, it was very "slippery" before the Multi-Sander was deployed....Got Rid of all the Flaking Paint & Sanded the Top Coat of the Previous Painting, before wiping the whole area with White Spirit to remove any Dust & Applied the Undercoat....

Just Checked now & the Coat looks Good, No Cracking, Peeling or Runs, so am pleased how it has gone so far, will leave it overnight & hopefully finish off the Door Frame tomorrow, before sanding down the removed Door & applying the Undercoat & Gloss as today.....

Grzyb · 3 Mar 2017

OK Guys...All Fixed...Door looks Nice

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What has Caused this Door To Peel?

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