I know the Honoré leather looks really fragile but it's far from it. The leather is the same as on the Roseau series. I've seen a 3-yr old Roseau that's been in daily use, no babying and getting stuffed to the gills - almost no wear. My Roseau has been through wind, rain and snow and no signs of wear yet. The hardware is also very durable.
I have just bought the Honore404 in White. It's now with a specialist for coating. Hopefully it will be durable!
Congrats on your purchase! Getting extra protection for a white bag sounds very smart. Might do that myself if I can ever manage to muster the courage to buy a white bag!