Nate Nagel wrote in
:

Was spot painting another area of my house yesterday... I'd taken
down a big mirror (permanently mounted) over my fireplace and cleaned
up the marks around it, patched the plaster around the boxes for the
wall sconces, etc. I started by shaving down the brush marks with a
razor blade and/or painter's scraper, then sanded with 80 grit, then
120 grit, patched some holes with patching plaster, went over
everything again with 120, primed with Kilz 2, then finally finished
with two coats of Benjamin Moore flat. (all paint was applied with a
3/8" nap roller, save for cutting in around the mantel, ceiling, and
window trim.)

Here's the weirdness. I remember after painting, stepping back and
noticing that there was a really noticeable spot at the upper left
hand corner of where the mirror was where there was a lot of the
texture of the old brush strokes from where the old paint had been cut
in around the mirror. I distinctly remember mentioning this and
making some comment about how I thought I'd done a better job prepping
than that. Went back today to remount the sconces and now it's barely
noticeable - if I hadn't known exactly what to look for and where I
would never have seen anything. Basically, what you'd expect from a
halfway decent prep job.

The only explanation I can think of for this is that the Kilz reacted
somehow with either some patching plaster or the old paint and bubbled
up, and then when everything dried it shrank back down to the wall.
Sound plausible? Should I make a mental note to sand that area back
down when I finally repaint the whole room, or not worth worrying
about?

nate



or the old paint and bubbled
up, and then when everything dried it shrank back down to the wall.

Far cry from your situation but have seen this bubbling when painting
with latex over a wall that had or still has wallpaper/wallpaper backing
under the paint. Solution in that case is to prime with oil base.

On Jan 19, 10:10*pm, Red Green wrote:
Nate Nagel wrote :





Was spot painting another area of my house yesterday... *I'd taken
down a big mirror (permanently mounted) over my fireplace and cleaned
up the marks around it, patched the plaster around the boxes for the
wall sconces, etc. *I started by shaving down the brush marks with a
razor blade and/or painter's scraper, then sanded with 80 grit, then
120 grit, patched some holes with patching plaster, went over
everything again with 120, primed with Kilz 2, then finally finished
with two coats of Benjamin Moore flat. *(all paint was applied with a
3/8" nap roller, save for cutting in around the mantel, ceiling, and
window trim.)

Here's the weirdness. *I remember after painting, stepping back and
noticing that there was a really noticeable spot at the upper left
hand corner of where the mirror was where there was a lot of the
texture of the old brush strokes from where the old paint had been cut
in around the mirror. *I distinctly remember mentioning this and
making some comment about how I thought I'd done a better job prepping
than that. Went back today to remount the sconces and now it's barely
noticeable - if I hadn't known exactly what to look for and where I
would never have seen anything. *Basically, what you'd expect from a
halfway decent prep job.

The only explanation I can think of for this is that the Kilz reacted
somehow with either some patching plaster or the old paint and bubbled
up, and then when everything dried it shrank back down to the wall.
Sound plausible? *Should I make a mental note to sand that area back
down when I finally repaint the whole room, or not worth worrying
about?

nate

or the old paint and bubbled
up, and then when everything dried it shrank back down to the wall.

Far cry from your situation but have seen this bubbling when painting
with latex over a wall that had or still has wallpaper/wallpaper backing
under the paint. Solution in that case is to prime with oil base.

yes, these were all latex products FWIW. Can you even get oil base
primer anymore?

nate

N8N wrote:

Far cry from your situation but have seen this bubbling when painting
with latex over a wall that had or still has wallpaper/wallpaper
backing under the paint. Solution in that case is to prime with oil
base.

yes, these were all latex products FWIW. Can you even get oil base
primer anymore?

I can in Seattle. Maybe not in California.

yes, these were all latex products FWIW. Can you even get oil base
primer anymore?

Yeah, the regular Kilz, not Kilz 2, is oil based. It works much better for
water stains. I have tried the Kilz Odorless and it was a disaster. Whatever
it is made from dries very slowly and runs like crazy. I used a spray can in a
small wall closet and got nothing but lace curtains.

--
Dennis