I set out to paint my kitchen which had high-gloss, Navajo White paint;
the lousy "contractor's special". I tried Jasco's TSP, first with a
rag, then with a ScotchBrite pad. It was mixed according to the
instructions on the label. In both cases, the TSP was a miserable
failure, even though it claims to be a deglosser. Even worse, using a
ScotchBrite pad has a sanding effect. Unless you want smooth walls or
are planning to retexture, I wouldn't use a ScotchBrite pad.
Another other option is to use a primer like Kilz or Zinsser. However,
those are somewhat pricey, IMHO.
Then I thought, "Geez, I may as well just retexture the stupid walls
and ceiling, since I have a hopper and all." This is certainly an
However, then, I came up with Plan D. Go buy some cheap wallboard
compound. Mix it extremely thin, i.e. paint consistency. Then, just
paint it on as you would any other paint. Et Voila, the walls are the
same as if they had just been textured. Of course, you need to let the
soupy mud mixture dry completely before painting.
Also, there is a possibility that the mud might flake off because of
the shiny paint underneath. However, I didn't have this problem and I
used this method for my kitchen, bathrooms, etc., wherever the
highgloss paint had been.