I just picked up a job lot of three old lenses on eBay which included a Sigma 70-210 with Nikon AF (the original motor in camera version) mount - seeing the mount in the pictures of this lot was the only reason I bought the lot - and a couple of manual zooms for other cameras. The Sigma is working well on my D50, apart from AF being a little noisy, but the outer surface of the casing is covered in a truly horrible rubbery black plastic which is sticky and slightly damaged in places. I'll be honest, I'm going to try to sell it on, but if possible I'd like to do something about the surface first.
Anyone know a way to clean this stuff and make it less sticky?