Originally Posted by
Doug Shepard
I've bought a few used machines in the past where the cast iron was that bad. Fortunately the biggest of these was a Delta Sanding Center and all the parts (even the table) was small enough to let them soak in WD40. That's not practical with your jointer tables but you might try building a dam out of something so that you can put a 1/16" to 1/8" layer of WD40 on them and let them soak good for a few days. I was able to get stuff cleaned up good after allowing them to soak before doing the sandpaper and more WD40 effort.