Hey thanks all!
So since I had some foam upholstery cleaner in the garage along with a bottle of Spot Shot I decided to try a small test spot with each. Neither seemed to do anything harmful so I went ahead and did the pull straps to see how clean I could get them.
Procedure went like this: applied product, gently scrubbed with a soft nylon fingernail brush and then blotted/gently wiped with a clean microfiber cloth until it wiped clean (no dirt transfer to cloth) The micro cloth seemed to kind of comb the velour as I wiped.
Now those pieces were a piece of cake, it's on to the upper panels and then the seats.
Before and after, this was with foam cleaner, Turtle Wax brand I think....I know, I try to stay away from that sh*t but I obviously bought some at some point. Maybe when I did the carpet.....anyways, quite a difference.
Ed, I had done a similar method to yours when I pulled the carpet from the donor car, however since the carpet was out and it was a nice day and hose was handy, I spared it no aggression with the soap scrub and rinse. Used the vacuum to get any residual out...
It came out pretty good save for the spots that were just plain wore out.....
The one thing I don't like about this 'Grey' is that it really comes of more like Powder Blue to me, particularly where it's sun faded....