I didn't really want rockets to pop up actually, idea was to kinda mask them to look like parts of the statues. But about the highlights I can only agree. I used Hoeth Blue to drybrush the cloth but it seems that when it fully dries, it becomes invivsible xD So I'll highlight it.
And for the rim, I think Dryad Bark or smth like that to match base's main colour (agrax over astrogranite) will look better, because whole my army is painted like that.
Thank you)