Almost all black clothing will have shine spots when it is ironed. This can be prevented with a cotton (press) lap. But now you still have a garment with shiny spots and you do not have time to wash it again? Just hang in the shower and a layer of hot water in the tub / or leave a few buckets. The steam they are almost completely gone. After that I gently polish with a new / clean sponge, and there's nothing to see.