That's super interesting. It's like the science behind the art. I wouldn't have thought that the gesso spray had finely ground glass in it, but it makes sense when you consider what you said about the paper's "tooth." Smart.
The close ups of the sketch are pretty cool too.
Thanks Dane. It's not a spray, though, it's a paint. I'm mentioning spray acrylics to seal underpaintings before gessoing, so as to not smear the underpainted water media with the wet gesso.
Okay gotcha. I misunderstood that part. Thanks for clarifying.