I have a 1990 560 SEL in Midnight Blue and have scraped the bumper and the 'skirt' beneath it in two places for a total of about 10 square inches. [:0] There's no structural damage but the blue paint has scraped away revealing the grey 'plastic' body. [!] Can I do a reasonable touch-up paint job myself? I don't have a sprayer (might be able to get one) --- but I thought there might be a Krylon that matches.  What's your thoughts?