GT 3.2 Drivers seat bolster had the french seam stitching broken when I bought it. Overstitching had been applied to hold the seam together, and that had started to fall to bits.
Pulled that to pieces today, got rid of the overstitch, cleaned and re-coloured the worn leather on the bolster, and using colour matched thread and a curved leather needle, re-created the french seam.
It took a bit of patience, but I am very pleased with the result. It does not look new, but does look like it has worn naturally.