I have the matte black NS-1 stripes on my ZL1 and have no problems keeping them looking nice. I also have a sunroof and they have no problems customizing them. PM SSTG or Night Shades. They will take care of you.
To keep the matte stripes looking perfect I use this:
http://www.chemicalguys.com/Chemical_Guys_SPI_995_16_Meticulous_Matte_Detail_p/spi_995_16.htm
Here are pics of mine:
