I just picked up a used mach 1 ram air hood for my 85 GT. It was not painted by the previous owner and overall looks ok. The questions I have is there are some small hair line cracks a few inches long in a few areas. Do they get worse or is there something I can do before I paint to keep it from happening more? It has the normal plastic mesh screens over the openings. Does anyone have any pics of something better to do there?