Once you get the blade cleaned up, keep it at room temp and in a dry shop. Blades get rusty when they are subjected to freezing weather where frost gets on them and creates moisture between the stack and can't evaporate off. Like the other guys said, don't worry about the name label, the paint thinner won't hurt the blade, and yes, if you just use that blade the rust will wear off. Remember the trick to soak your blades to get the pitch off once in a while. The pitch creates heat as you saw, which reduces the life of the carbide tips.