my new sig came thru with dark streaks running thru the nitron finish.. i dont want to send it back and wait weeks/months to get it back . so what can i do ? i dont have any idea if the streaks are in the metal under the finish,or just the finish itself.. i think the slide is a brushed finish under the nitron. how can i remove the nitron without losing the finish under the slide ie:the rails in the slideand ect .?