[Art Hoch]

This may be too late to help you but I solved a BIG stain problem on a Z chairiside I have years ago.  I miixed whiting compound (what was used years ago when people mixed their own paint) with water to a paste consistency and applied it to the stained area.  I let it dry 24 hours and then tenderly scraped and wiped off the powder with a cloth.  Much improved.  Repeated that 4 times.  The last time it did not improve so I stopped.  After refinishing the cabinet you CANNOT tell where the stain was.  (There were 2 large areas of stain.)  Cheap and easy fix.  Have before and after pictures if you want them.