I have been cleaning up my old saw. Got the table smooth, but haven't gotten the stains out yet. I will try some of the suggestions above. Also cleaned off the blade, as it had residue from cutting vinyl siding on it.
I took out the table insert and was surprised at how thin it is. While reading up on Zero Clearance Inserts(ZCI), most cut them out of thin ply and run the saw blade up through them. My OEM insert measures .091" with a micrometer. What do you use that is that thin?