If it isn't too late, pull that rusty pan out of the trash, you can salvage it without any problem. Thoroughly scrub all rust out of the pan, then coat the inside (and outside) of the pan with salad oil and place into a 400F oven for about 30-minutes, be prepared for some smoke. Remove and allow to cool to the touch, then repeat. Your pan has now been seasoned. DO NOT soak the pan in water...ever. To wash, simply rinse in warm soapy water, rinse, wipe dry and place into the oven while it is still warm from baking your pizza(s) to thoroughly dry. Properly cared for, a seasoned pan will last for a very long time.
As for the dark colored pans, they are fine at temperatures all the way up to about 600F with dough in the pan, keep in mind that the pan will never reach that temperature as your pizza inside of the pan will hold the temperature down. Your baked pizza will only reach temperatures in the 200 to 210F range.
Tom Lehmann/The Dough Doctor