MRP-F053 Black Leather paint turned out to be dead on for the rubber dust boot on the control stick in the Su-25 I'm building if you're looking to just simulate it by painting.
If you want more of a rubber sheet, you can use the above, along with some lead sheet. Lead sheet is really easy to cut and shape to whatever you want it to cover and the softness of the metal lets you easily and quickly engrave patterns and textures into it. After that, you can just prime it with Gunze Mr. Metal Primer and paint it.
Here's a pic that shows the rubber boot, and a little bit of the green seat cover I made with lead sheet.
