Hi all,

I've just started to decorate an old room, rubbing down the old gloss
on the window frame and sill, and have applied some Dulux water-based
gloss. Now -- horror of horrors -- it's coming right off, flaking up
off the surface in some areas or simply mudcracking.

What's gone wrong? The tin specified no need for a primer. Could it be
that the old (presumably oil-based) gloss won't take the new water-
based stuff, even after a swift rub-down? Should I have used some
primer before starting with the gloss, even though there was old gloss
paint on there?

Please help -- I'm not sure how else to continue at the moment and so
could use some of the group wisdom. Thanks.

Chris wrote:
Hi all,

I've just started to decorate an old room, rubbing down the old gloss
on the window frame and sill, and have applied some Dulux water-based
gloss. Now -- horror of horrors -- it's coming right off, flaking up
off the surface in some areas or simply mudcracking.

What's gone wrong? The tin specified no need for a primer. Could it be
that the old (presumably oil-based) gloss won't take the new water-
based stuff, even after a swift rub-down? Should I have used some
primer before starting with the gloss, even though there was old gloss
paint on there?

Please help -- I'm not sure how else to continue at the moment and so
could use some of the group wisdom. Thanks.

I have had a similar problem try some undercoat, can't remember if I
used water or oil based, one worked one didn't! try oil first, or
international paints wood primer. Also use genuine white spirit.

On Mar 30, 12:17*pm, Chris wrote:
Please help -- I'm not sure how else to continue at the moment and so
could use some of the group wisdom. Thanks.

May be silicone contamination, try googling or a good decorators
merchant should be able to advise.

cheers,
Pete.

Thanks chaps. I think I might just try and strip off all the paint and
start again (if you're going to do a job etc.) as there does seem to
be another coat of gloss beneath the coat I'm painting over. It's a
Victorian house though, so I'm slightly concerned about dealing with
leaded paint if I start going at it with the heat gun. Hopefully I can
start again with bare wood, just primed then painted over with the
stuff I've bought.

On Mar 30, 2:21 pm, Chris wrote:
Thanks chaps. I think I might just try and strip off all the paint and
start again (if you're going to do a job etc.) as there does seem to
be another coat of gloss beneath the coat I'm painting over. It's a
Victorian house though, so I'm slightly concerned about dealing with
leaded paint if I start going at it with the heat gun. Hopefully I can
start again with bare wood, just primed then painted over with the
stuff I've bought.

Just to offer an update, I stripped all the paint from the window sill
and frame back down to the bare wood, cleaned it, put two coats of
Dulux primer/undercoat (water-based) and then another couple of coats
of the same gloss on, and still I get cracks and the odd flake coming
off.

I can only assume it's something ingrained in the wood that reacts
with the water-based paint, as the skirting boards have been fine.

It'll do for the time being -- it's much better than before, but I'll
want to redo it before too long, and I'll use some solvent-based
liquid gloss on it next time.

Chris wrote:
On Mar 30, 2:21 pm, Chris wrote:

Thanks chaps. I think I might just try and strip off all the paint and
start again (if you're going to do a job etc.) as there does seem to
be another coat of gloss beneath the coat I'm painting over. It's a
Victorian house though, so I'm slightly concerned about dealing with
leaded paint if I start going at it with the heat gun. Hopefully I can
start again with bare wood, just primed then painted over with the
stuff I've bought.

Just to offer an update, I stripped all the paint from the window sill
and frame back down to the bare wood, cleaned it, put two coats of
Dulux primer/undercoat (water-based) and then another couple of coats
of the same gloss on, and still I get cracks and the odd flake coming
off.

I can only assume it's something ingrained in the wood that reacts
with the water-based paint, as the skirting boards have been fine.

It'll do for the time being -- it's much better than before, but I'll
want to redo it before too long, and I'll use some solvent-based
liquid gloss on it next time.

oil based gloss is certainly a far better performer. Water based
glosses are, well, just adequate IME.


NT

On Apr 21, 12:08 am, wrote:
Chris wrote:
On Mar 30, 2:21 pm, Chris wrote:
Thanks chaps. I think I might just try and strip off all the paint and
start again (if you're going to do a job etc.) as there does seem to
be another coat of gloss beneath the coat I'm painting over. It's a
Victorian house though, so I'm slightly concerned about dealing with
leaded paint if I start going at it with the heat gun. Hopefully I can
start again with bare wood, just primed then painted over with the
stuff I've bought.

Just to offer an update, I stripped all the paint from the window sill
and frame back down to the bare wood, cleaned it, put two coats of
Dulux primer/undercoat (water-based) and then another couple of coats
of the same gloss on, and still I get cracks and the odd flake coming
off.

I can only assume it's something ingrained in the wood that reacts
with the water-based paint, as the skirting boards have been fine.

It'll do for the time being -- it's much better than before, but I'll
want to redo it before too long, and I'll use some solvent-based
liquid gloss on it next time.

oil based gloss is certainly a far better performer. Water based
glosses are, well, just adequate IME.

NT

It would certainly appear so. This is the first time I've tried water-
based gloss, and although the drying times and washing up times are
greatly reduced, I'm not impressed with the finish compared to other
parts of the house painted with oil-based paints.

Chris wrote:
On Apr 21, 12:08 am, wrote:
Chris wrote:
On Mar 30, 2:21 pm, Chris wrote:
Thanks chaps. I think I might just try and strip off all the paint and
start again (if you're going to do a job etc.) as there does seem to
be another coat of gloss beneath the coat I'm painting over. It's a
Victorian house though, so I'm slightly concerned about dealing with
leaded paint if I start going at it with the heat gun. Hopefully I can
start again with bare wood, just primed then painted over with the
stuff I've bought.
Just to offer an update, I stripped all the paint from the window sill
and frame back down to the bare wood, cleaned it, put two coats of
Dulux primer/undercoat (water-based) and then another couple of coats
of the same gloss on, and still I get cracks and the odd flake coming
off.
I can only assume it's something ingrained in the wood that reacts
with the water-based paint, as the skirting boards have been fine.
It'll do for the time being -- it's much better than before, but I'll
want to redo it before too long, and I'll use some solvent-based
liquid gloss on it next time.
oil based gloss is certainly a far better performer. Water based
glosses are, well, just adequate IME.

NT

It would certainly appear so. This is the first time I've tried water-
based gloss, and although the drying times and washing up times are
greatly reduced, I'm not impressed with the finish compared to other
parts of the house painted with oil-based paints.

IMO ok for exterior woodwork 1st floor and above where it doesn't need
to be particularly hardwearing and you don't see the brushmarke etc. It
lasts well, such as it is, and keeps its colour better than oil based