Hi Pautinka, I did it. And it's turned out brilliantly! So thank you for inspiring and encouraging me. I bought some colour catcher sheets (never heard of them before but they were recommended on this thread) and washed it in lukewarm water with a little bit of wool wash. I was pretty nervous but as soon as I got it in the water I realised it was surprisingly robust, not half as delicate as I had imagined. I rolled it in a towel and dried it flat.
There's been no colour run, the smell is gone and so is a greasy mark on the border. Best of all, it feels a lot softer than before -- when it arrived I wondered for a moment whether it was authentic as it was so stiff. Everything else was right: the colour, the pattern, the hem etc but it felt totally unlike my other vintage scarf which is very soft. Now that it's been washed I feel much happier about it all round! It's got a few yellow age spots and a pulled thread but other than that Ingrid is in pretty good shape for her 47 years! I'll take a piccie tomorrow in the daylight to post.
Toodle pip,
Parthenope.