The P6 and .AQ icons were seriously rough, having drawn them in Gimp. Redid the whole thing using Inkscape which is a vector-based drawing program, as opposed to raster-based like Gimp. That’s no kick against Gimp; I still used it for some final cleanup work and to scale the icons down to a workable size. So anyway… there ya go.
Oh, yeah — “.AQ” is indeed the top-level domain for Antarctica. You can’t use it unless you’re a research entity with operations actually based there.