Gerardo and I worked out a nice little dish setup such that the primary and secondary prisms on one side of the optic barrel could soak in acetone for a while today.  We used an SST dish lid and organic cotton rounds to sit the optic in a bath of acetone submerging both prisms.  With an all glass pipette, we will add acetone as needed over the next few mornings.  The evaporation rate in the setup is on the order of 10s of minutes, so needs far less babysitting than the setup needed when only removing one prism.