I did the shawfire fix on maroon upholstry in a '90 Imperrial some years back. It worked. Difference was, however, with this dark color I did not use glue but matching color nail polish. Repaired carpet using a similar system on some cars I worked on as well. If you were looking at any of the fixes and knew they were there you could pick them out. Still, no one who didn't know, including in one case the owner of the car, ever commented on the repairs or seemed to notice them.