wow.. haven't been here for awhile and this thread is still going?
you guys are too impatience. did you guys even read my post? if you follow what i did you would get same result... but you put in too much what others are saying (ie. acetone vs. mineral spirit, drying time, etc.)
why use acetone when mineral spirit works? it's been researched many time and found this is the BEST for the job.
why is it not hardening and yellowing? too thick. try thinning it down or wait til it dries then wet sand, let dry (from water) and re-apply. should be dry enough within 3-4 hrs. i just leave it overnight and work on it next day.
again, READ MY POST if you want good results. that piece i did took me almost a week working OUTSIDE a garden area.