I picked up something in this video that HE DID NOT DO... which I always do on SS..... I clean the oxide off the edges before I weld with a rolox disc (fine)...
He also welds at the same speed he talks -- S L O W L Y..... IMHO way too slowly. But you still learn stuff from his videos because he produces them as though he's talking to a classroom full of 5 year olds.