really, if you've washed it properly, then the leather shouldn't do anything... Don't use a blade, though, you really will scratch if there's *anything* left. I use a "leather" Microfibre and it's very effective.
Dealers:
I've good experiences with elite -
www.elitecarcare.co.uk
i4detailing were also OK, even if they did use a strange courier -
www.i4detailing.co.uk
Polished bliss and cleanyourcar have *very* good reps over on detailing world.
I personally really like Bilt Hamber's Autoclay and Colly 478. The colly did the 307 5 times, the Octy three, my car twice, a C-class twice and it's still not empty
I have a kestrel rotary, too, with pads from elite. Nice machine, bit fast but you can't have everything.
I think the session I do at christmas will be 2-bucket wash, fix stonechips / trim, AG bumper care (diluted!), rinse, clay, mask, machine with care with Menz glaze, AG's EGP, then a couple of layers of colly. That should do it. I'd like some snowfoam for the soak, but I can't guarantee a pressure washer, so I think it will be a handheld job FTM.
I use a Vileda MF with "pick-up pockets" for applying wax (doesn't eat wax...) and an AG perfect polishing cloth for taking it off again.
Oh, and if you need touchup, paints4u.co.uk. Managed to get four tins over here inside 4 days. I just need an aerosol now...
Bret