Out of time: send new schedule please

Well, still haven't finished knitting the back of Stu's sweater. I have finished all the intarsia, and have only about ten rows of plain stockinette to go. I usually (read: always) fully wet-block a sweater before seaming and finishing. I did it once; it works; I keep doing it. However, there's not going to be anywhere near enough time to do that before Stu arrives tomorrow at around 3pm. This sweater could really do with a blocking just to even out the slight variations in the intarsia tension; will a steam block do the trick, do you think? This is a pure wool yarn (Rowan Cork) which has been overdyed by me; is steam a bad idea? Hoping to finish the main knitting and get the ends sewn in this evening. Everything except fingers crossed (it interferes with the knitting, you know). UPDATE: The knitting on the back is finished.... There's a lot of ends to weave in, though