Slate/Stone, Gemini, Seal Gray -- what touchup paints have you used successfully?
 

I've read all of the archived posts on touching up chips. It seems like, generally, people have had success with paintscratch.com, the AutoVisuals’ AutoSharp Pen products, and either the carcareonline.com or Langka approach to smoothing/blending.

Has anyone with Stone/Slate Gray (LY7U) paint or another similar metallic gray or silver, specifically, had success touching up their car? If so, which products did you use, how did you do it, and how good was the match (color and metalic texture/appearance)? Any thoughts would be appreciated!