I finished dying the stitches in my cloth interior a while back. This truly is not for the faint of heart. I managed to get all the red on the stitches and not on the seat with the Fine tip (since Elmers discontinued the Ultra Fine red pen
).
Firstly you must get a brand new, very sharp razor blade and sharpen the hard-felt tip on the pen. Do this while the tip is new otherwise it will make a mess. I'd take a picture but its pretty self-explanatory. Just don't sharpen the tip too much or the capillary action of the tip will cease and no paint will flow.
Have plenty of light. Bring extension cords and small desk lamps in the car if you have too. I used one with a heavy base and a metal, snake-like flexible post so I could position the light optimally.
Steady your hand in imaginative ways. Think about when you fire a rifle in the woods. If theres a tree nearby you would put one hand on the tree and use that to steady the stock. Use seat bolsters, dash pieces, bring in other little steadying objects from the garage. Sounds overkill I know
I haven't taken any pics other than the one on the previous page but I'll get around to it this weekend I'm sure.
Oh, I also did a stress test on the dyed stitches on the back of the seat. I just rubbed some bluejeans on the stitches, medium pressure for about a minute. I observed no flaking or fading. The stitches had dried for about a week at that point and had set in the hot sun (not sure if that matters).