This is excellent information, thank you!I regularly use Collonil Carbon Pro on any new bag, and have re-sprayed bags that I feel warrant extra protection (Collonil instructions say that you must reapply to keep the protection). I've sprayed Chanel tweed, aged calf, lambskin, and sheepskin with zero changes or issues. (I have a degree in textile science, so I feel confident that I'd notice any change.) I think one of the keys is applying in very light, thin layers, being careful not to be heavy-handed or create drips. I have sprayed multiple coats, being careful to let sprayed areas dry first; Collonil dries very quickly. I spray outside (out of direct sunlight), on an old white towel, inside a large cardboard box, to catch any overspray. Then I do inside, outside, top, and bottom of the bag in stages. I've also sprayed Gucci jacquard, leathers, canvas straps.....I love Collonil, and always have spares in the closet. I have a fairly large bag collection, and have experienced no issues spraying any bag of mine. Hope this helps you feel more comfortable!It is a leap of faith to spray a bag of that price, esp. the first time, but I've had nothing but excellent experiences.
How do you deal with leather woven straps? Do you spray and then wipe the metal? This is the area that is most scary for me.