Removal of residual colloidal silica from metallography sample

[Dave_H]

Hey there,
I've been having some issues with residual colloidal silica on a metallography sample (mounted in Bakelite). I used a Vibromet for several hours as my final stage of polishing which gave me a really nice polish, but now I'm having trouble with EDS and high-res SEM as I'm trying to image primary/eutectic silicon phase and I have some residual colloidal messing things up.

I have tried just using a fresh polishing cloth and water, but that hasn't fully cleaned it up. Just wondering if anyone has any neat tricks to clean up a sample?

Thanks,

 

[chemisttree]

Ion mill followed by EDS.