What a beautiful bag! I love straw Coach bags and I have rehabbed several of them, and I have given some as fun, summertime gifts! In fact, am carrying my Bonnie Straw Convertible Tote 13400 right now!
I think that one of my straw rehabs is similar to your bag; it is the Coach Straw Basket 10728, China 2006 (Brass/Natural/White) and it was authenticated by
@BeenBurned. The bag appeared in the Spring 2007 Catalog for $258. It has pastel watercolor striped Lining from the Hamptons Collection. I paid $7 for it at a thrift store back in 2013 and I still have it!
I did not dunk this bag but I have succesfully dunked and washed a few other (more pliable and finely-woven) straw bags that were dirty and/or misshaped.
I've found my the original rehab post for the Straw Basket 10728 but it is an old post and it is difficult to access and read, and some of the links don't work anymore. So I have copied the steps that I took for the rehab below:
"I vacuumed it inside and out, wiped down the straw, cleaned the lining with non-alcohol baby wipes, scrubbed the soiled fabric and leather areas with a toothbrush, and replaced the hangtag. The brass has a slightly antique look that I like, so I mostly left it alone, but I did put a little metal polish on the turnlock because it was tarnished.
I used a small nail scissors to trim the frayed straw and then touched up those areas with Dritz Fray-Check that dries invisibly. I hope that it will prevent further damage. The white patent leather trim has yellowed a little but I don't think that I can do much about that?"
You can see the the After pictures of my Coach Straw Basket 10728 at the link below. Good luck with your straw bag!
https://forum.purseblog.com/threads...c-or-beach-rehab-reveal.815392/#post-24492755