Drew, I don't cast anything.
But I do stabilize. I have chosen to use vacuum only.
I am certainly no scientist but I do harken back to my high school physics classes. We were taught that nature hates a vacuum and will fill it with something.
Based on that, I concluded that removing air and moisture from the wood cells with a vacuum will result in the acrylic solution replacing the resulting void. Seems logical to me.
OTOH, I don't see it as logical trying to force solution, with pressure, into cells that are already occupied with moisture and air.
So far my results have been completely satisfactory.
I'll concede this is a hotly debated subject on one of the penturning forums and there are those who do not agree with my approach.
"Folks is funny critters."
Think for yourselves and let others enjoy the privilege to do so, too. ~Voltaire