Nothing earth shattering but I just tried cleaning a table saw cast iron top using a method suggested by a YouTube contributor. It simply involves spraying the top with PB Blaster and using a very fine Scotch-Brite pad and a random orbital polisher. It removed all of the stains and spots. The top wasn't in bad condition before but it looks almost new now. I tried the same approach before but without the polisher and never achieved the same results. As further suggested I'll remove the oils from the PB Blaster and follow up with a few coats of wax. Like I said, nothing earth shattering but the results are amazing.