*scratches head* I know we’ve had a bunch of Breyers customizers here on the forum over the years, hopefully one will pop up soon. I’m not one! lol though I do have a very small left from childhood collection and pick them up at tbrift stores to resell-I’d advise checking there or yard sales before you hit eBay, or even here in the non-Windstone classifieds. One thing I will recommend is a model animal collector’s forum, STS is its name. There are a bunch of repainters and even sculptors there, and the people were pleasant.
I think that usually acrylics or powders are used, but don’t quote me on that.