Re: Greetings, everyone!
From the photo, it looks pretty straight. You also want to check to see if the rollers are moving. As for cleanup, a bottle of Hagerty silver polish and a rag will shine this thing up and have it back to looking new in no time.
One quick hint for people experimenting with saxophone repair for the first time. As you disassemble the sax, take photos of the keys and make notes about where you see corks and felts. Also, keep track of the order you take the keys off in and have some way to organize the rods, pivot screws, set screws, springs and other parts while you are in progress. This will potentially save you hours of frustration as you struggle to remember what goes back where and how it gets regulated.
I can still remember my first overhaul. It was a silver 1920's vintage Conn alto. I was in my 20's and I knew nothing about repair at the time. However, I got some great pointers going into it from Randy Jones of Tenor Madness. Noting where everything needed to go up front and being shown a few tips about timing and regulation was a huge help!!!
Again, best of luck and enjoy!!!