I used the oil-based original Kilz to block some water damage to my
popcorn textured ceiling. Then I repainted with a flat finish ceiling
paint but the area where I used the Kilz is very glossy whilst the
rest is flat (as it was supposed to be). Anyone got any ideas about
how to proceed to flatten the gloss? I'll redo the ceiling if I have
to but I don't want a glossy ceiling.
My guess would be that you were either too generous with the Kilz
making that area smoother than the rest so it "looks" to have a shine,
or you were too stingy with the finish paint which resulted in the Kilz
Repaint for consistent (or feather out over larger area so it is
not as noticeable) texture, or for better (2nd coat) coverage.
If you're going to use Kil-Z or Bin, or similar product as an undercoat, expect
to have the repainted area look noticeable different (either "shiny" or darker
than the surrounding area). I found this out the hard way and was later
roundly berated by some friends who paint professionally.
You rough up the area you used the Kil-Z on, debriding enough to wear off the
topcoat, then re-undercoat with regular primer, feathering out.
In the case of the OP's problem, a popcorn ceiling, I'd suggest debriding
gently with a stiff nylon, or perhaps a brass or bronze wire brush. Steel
wire's too stiff, IMO.
Here is what happened, the Kilz has sealed substrate. Even if you use a cheap
vinyl latex paints, the vinyl will not be absorbed into the texture or
wallboard and it will have the look you describe.
The cure is to use kilz (or other similar products) from an spray can and apply
a light coat (only enough to block the stain). If you use a brush or a roller
to apply the kilz from a can, what you describe is a common problem that
Your cure is to prime the entire ceiling and to then repaint the ceiling. This
will give you a nice even look all over.
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