I don't know about dark grey. I think the helmet skirt is the slate blue color you were using, but I also think the vest is slate blue with heavy grey and brown weathering making it look grey. I am not saying I am right. It is just my opinion.
I've got good news and bad news.
First with the good:I found some nice steel blue vinyl a little darker than the leather I was using.
The bad news: I have a very limited supply maybe 4 or 5 I'll have to measure it.
Ok folks heres the deal. I'm finishing one for Obrotherracing then I'm taking a small break. That being said I will probably still be doing some in my down time. We have a house issue to work out (where to live) but I'll still be on here. I should also have a tutorial when I get back to it.