I have some acrylic stabilized pen blanks, but I haven't cut them yet.
What is done from what I understand, is the wood is soaked in a bath of hardner (acrylic in this case) under a vacuum and it pulls the material through the grain of the wood.
I copied this from the Rockler website.
I bought the polyacryl, but have not used it yet.
"Polycryl is a large molecular weight acrylic polymer that will fill and strengthen semi-punky or spalted wood. Polycryl is water-soluble and penetrates best when the wood is green. Polycryl may not fortify extremely punky wood. The softer the wood, the better the penetration. Polycryl will not penetrate hard wood. Note: Polycryl should be used before Pentacryl.
DIRECTIONS: The wood should be rough carved or turned first in order to obtain the best results. Add 1 part POLYCRYL to 4 parts hot water and mix well. Note: It is important to use a weak solution at first to obtain maximum penetration.
Soak wood in the diluted solution overnight or until wood is completely saturated. Once saturated, place wood in a full strength solution of POLYCRYL. Let the wood remain in the solution for at least one week. Large pieces may take longer. Once the wood is saturated with the POLYCRYL, remove from the solution, drain and dry slowly in an unheated, cool area.
When a piece of wood to be treated is too large for soaking, the POLYCRYL can be brushed on. First brush on the 1 part POLYCRYL to 4 parts hot water solution until the wood is saturated. Cover the wood with plastic to prevent drying between applications. Once the wood has been saturated with the diluted solution, apply a full strength solution of POLYCRYL. Brush on as much POLYCRYL as the wood will absorb and cover with plastic. Repeat this process until the wood is completely saturated. This may take a week or more of repeated applications. It is important to keep the wood wrapped in plastic during the treatment process. Remove the plastic to allow the wood to dry slowly in an unheated, cool area."
Hope this helps.