Chris Bacon wrote in
:

On 10/09/2020 21:39, Stephen Duppe wrote:
I am preparing some acrylic-painted artist's canvases for
overpainting, beginning by putting on some layers of gesso. The brand
of gesso I'm using is Winsor & Newton's "Professional", which is
supposed to have the best covering power of all the gessos they make.
Nonetheless on some of the canvases I have already put on three coats
and may well need more.

Would something like Zinsser's "123" primer do the job better?

No idea, but I would observe that if it's already been acrylic'd then
thats the way to go instead of rissing about with "real" gesso or
making your own with hide glue and chunks of the cretaceous Downs.

Thanks for this. I think the 123 contains chalk. Could be that they wouldn't be
in breach of the Trades Descriptions Act if they marketed it as "gesso"?

Stephen