Adrians english is not the best thats true. He told me on Wednesday he gets a few hundred emails per day, from nearly all over the World. Keep in mind, that there are only he and his near family to do the whole Job. Making Couchphotos, preparing Instruments for Shipping, adusting instruments before shipping, making Videos, writing the Certificates and packages that come with the Bass...all done by Adrian, and mostly his Daughters + 1/2 further Empoyees.
So Adrian answers all the emails by himself and keeps them as short as possible. You have to know him a little, to get that right.
He just told me, a few minutes ago that they will do the matte metallic finishes that you asked for. So go for it. I guess he had to make a consultation with the paint guys at Mensinger in Waksmund first.