[whale]

Having been reading about Durabak myself lately, they do specify to use only Xylene.

Check the Do's and Don'ts on the application notes:

http://www.cotelind.com/apptips.html#do

"DO Use only xylene cleaning solvent as last step before applying DURABAK™ and to thin DURABAK™ if necessary."

You should be able to get xylene at a paint store ie Sherwin Williams) and likely at you local big box (Depot or Lowes).