My first step was to buy some Dollfie Stain Removal Cream from Volks JP. I was hoping it would work much better than it did, and admittedly was a little disappointed after a month of waiting and not much of a result. I'm not sure if I did something wrong or got a bad batch, but I ended up changing my strategy a little bit and the stain started quickly improving.
After about a month I had run out of the Rescue Cream and wasn't really wanting to spend another $35 for something that was barely taking effect. I decided instead I would try something else, and the results were dramatic after only two days rather than a month.
I used Tony Moly Tomatox Magic Massage Pack, which is a Korean Skin care product for your face. I figured if it was safe for your skin, surely it would be safe for doll "skin" as well so it wouldn't hurt to try it. It's difficult to see in the pictures, but the result was actually quite noticeable in person. I then applied another layer of Rescue Cream (Because I have no self control and ended up ordering another container anyway, this time from the US Volks) and the end result is now a nearly stainless Kos-Mos! She could use one more coating of the stain removal cream, but my impatience is killing me so for now this is how things are going to be. At some point I will work at removing the rest of the stains.
If you're unable to remove stains from a DD, I highly recommend the Tony Moly Tomatox first before the DD Rescue Cream. I don't know if that's what did it for sure or not, but as you can see from pictures the next batch of rescue cream was much more effective after using the Tomatox.
I will be posting pictures of Kos Mos soon as well as many more unboxings! I have some catching up to do!