Ooh, I see now. That's 2 separate canvas panels...
That's a neat idea. You very well could be setting the base for a new creative trend! Very good!
I feel like SOMEONE has to have thought of this already.
Pour and press is more accurate. I do the pour on one canvas, then press the face of the second one down on top, like making a sandwich. Then carefully open it back up so it's mirrored.



It’s called:
Rorschach test
(That doesn’t discredit the neat/pretty factor in any created art.)