[CWKnifeman]

I know that this hasn't been open for a while, but here goes. As someone who has worked Ivory off and on for about 29 years,Stabilization of Ivory can be done several waysThompson's water seal is one that is probably the least expensive way to go; Minimal color change but it will still flex a little. Next is Paleo Bond many coats over several days; with no distinctive color change, with little movement. Next is Comercial stabilizition; sometimes you may have a slight color change, very little if any movement. Lastly super- glue; minimal color change, but may have some movement. No matter hwich method you use always use either thin super-glue (the cyano type), as this will fill any surface pores. Once you've done this you can finish as needed. Ive never used the Blue rouge for plastics, but I've always used Zam Rouge compound on a wheel that I only use for Ivlry and then Pink no scratch.
I hope that this is of some help to others in the future.