Does anyone have a familiarity with the Kooba Marcelle Canvas? Do you love it? It seems a bit hard to keep clean....can I scotchguard it? I've always thought it was a great looking bag, but then wondered with it being canvas if maybe the bottom sides would wear away - if I got dirt on it, it'd be ruined. At least with leather you can do a leather cleaner, but canvas? Any thoughts would be appreciated!