Yeah that's exactly what they are..the best shine with the least work I found is Mother Polish cream and a Power Ball polishing tool on a drill , you can do it by hand but it will take a lot longer than with the ball
those rims you got might be ITP's , there are a couple of brands had that style , I have a set of Highlifter 8 hole
these are ITP's 4 hole with Mudzilla 26's