There are tons and tons of materials that are heat resistant, especially at such relatively low temperatures. If you give a hint on approximately what you'll be making, that should probably narrow the list down a bit. Other things to take into account would be how easy it is to work with, toughness, hardness etc.
As for paint, there are a lot of paints used for coating engines that are very very resistant, cheap, and easy to get your hands on. Your local car part supplier should be able to to supply you with some, or at least point you in the right direction.