I don't think you'll have any problem with it but for small items, burl is often "stabilized." This means that it is soaked in some sort of plastic solution that when dry, effectively glues the various nodes together.

On some of the wood working forums it is often suggested that the piece be turned or shaped to close to the final dimensions and then given a liberal dousing of CA (thin super glue). This allows you to work to final dimensions without any problems and then the piece is given another liberal dose of CA to make sure it is stable. Allow to dry thoroughly between each application. Use quality CA.

The CA will not prevent a nice finish from being applied, although some take the piece down to the final stages (I sand all my stuff to 4000 grit in Abralon ) and then use CA as the "varnish." When done correctly the result is like glass but it is tricky to polish.

Just some thoughts...your mileage may vary.