couldn't you just hit them with some sand paper and then paint? I found a few write ups. I found a really good a while back but did not save the link.
http://www.ehow.com/how_4922704_paint-chrome-car-trim.html
http://www.pelicanparts.com/bmw/techarticles/JF-Tech/Blacking_out_chrome_trim_E30_3Series.htm
http://www.ehow.com/how_4922704_paint-chrome-car-trim.html
http://www.pelicanparts.com/bmw/techarticles/JF-Tech/Blacking_out_chrome_trim_E30_3Series.htm